# Casio FX-991 EX classwiz calculator tutorial (perfect for algebra, FE exam, EIT exam)

TLDRThis tutorial introduces the Casio FX-991 EX classwiz calculator, ideal for algebra and engineering exams. The presenter demonstrates solving quadratic equations, systems of equations, complex numbers, logarithms, inverse sine, summation, derivatives, and integrals. Viewers are also invited to participate in a giveaway by subscribing and commenting on the video for a chance to win a calculator by December 31st, 2016.

### Takeaways

- 🔢 The video provides a tutorial on using the Casio FX-991 EX classwiz calculator, highlighting its capabilities for algebra and various exams.
- 🛒 The calculator's price at Target, including tax, is approximately $21.
- 🎁 There is a giveaway opportunity for a calculator; viewers are encouraged to watch the video until the end to learn how to participate.
- 📚 The calculator can solve quadratic equations, displaying both the roots and the vertex of the parabola.
- 🔍 For solving systems of equations, the calculator requires the number of variables and their coefficients, handling up to three variables in this example.
- 🔑 The calculator has a complex number mode, allowing for calculations involving 'i', the imaginary unit.
- 📈 The device can compute logarithms with any base, demonstrated with log base 8 of four.
- 🔄 To switch between modes, such as from complex to standard calculation, the menu and calculate buttons are used.
- ∑ The summation function is available, demonstrated with a summation from x=3 to x=8.
- 📉 The derivative function provides the value of the derivative at a given x value, but does not output the derivative expression.
- ∫ The integral function calculates the definite integral of a function over a specified interval.
- 🎉 The video concludes with instructions on how to enter the giveaway, which involves subscribing to the channel and commenting on the video for a chance to win based on the number of likes received by December 31st, 2016.

### Q & A

### What is the purpose of the video?

-The purpose of the video is to provide a tutorial on how to use the Casio FX-991 EX classwiz calculator for solving various math problems and to announce a giveaway of the calculator.

### How much does the Casio FX-991 EX classwiz calculator cost at Target after tax?

-The cost of the Casio FX-991 EX classwiz calculator at Target after tax is approximately $21.

### What is the first math problem the tutorial solves on the calculator?

-The first math problem the tutorial solves is a quadratic equation.

### How does the calculator handle equations with a higher degree than two?

-The calculator can also solve polynomial equations with degrees 3 and 4, not just quadratic equations.

### What key combination is used to find the vertex of a parabola on the calculator?

-The script does not specify the exact key combination for finding the vertex, but it mentions that the calculator will display the vertex information after solving the quadratic equation.

### How does the calculator solve a system of equations?

-The calculator solves a system of equations by entering the coefficients and constants into the calculator, selecting the number of variables, and pressing equal to get the solution.

### What is the process for entering complex numbers on the calculator?

-To enter complex numbers, you go to the menu, select complex numbers mode, and use the 'I' button to represent the imaginary unit, entering the real and imaginary parts as instructed.

### How can you change the base of a logarithm on the calculator?

-You can change the base of a logarithm by using the log base button and then entering the desired base before entering the argument of the logarithm.

### What is the process to find the inverse sine of a number in degrees on the calculator?

-To find the inverse sine in degrees, you press shift, then the sign button, enter the fraction, and ensure the calculator is set to degree mode.

### How does the calculator handle summation and differentiation functions?

-The calculator has specific keys for summation and differentiation. For summation, you enter the function and the limits of summation. For differentiation, you enter the function and the value of x at which you want to find the derivative.

### What is the method to find the integral of a function on the calculator?

-To find the integral, you use the integral function key, enter the function inside the integral, and specify the limits of integration.

### How can viewers participate in the calculator giveaway?

-Viewers can participate in the giveaway by subscribing to the channel and writing a comment on the video. The winner will be the person with the most likes on their comment by December 31st, 2016.

### Outlines

### 📚 Scientific Calculator Tutorial

This paragraph introduces a tutorial on using a scientific calculator for solving various mathematical problems. The speaker demonstrates how to solve a quadratic equation using the calculator's equation-solving mode, explaining the process of entering the equation in standard form and obtaining the roots. The video also covers finding the vertex of a parabola, which represents the minimum or maximum point. The tutorial continues with solving a system of equations, entering coefficients, and obtaining the values for variables x, y, and z. The speaker emphasizes the convenience of the calculator's features and encourages viewers to watch the entire video for a giveaway opportunity.

### 🎁 Calculator Giveaway and Advanced Functions

The second paragraph focuses on a giveaway of a scientific calculator and introduces more advanced calculator functions. The speaker explains how to perform calculations with complex numbers, logarithms with any base, inverse sine in both degree and radian modes, and summation of a series. Additionally, the paragraph covers derivative calculation for a given function, noting that the calculator provides the value rather than the expression. The integral of a function is also demonstrated, showcasing the calculator's ability to compute definite integrals. The speaker concludes by explaining the giveaway rules, which involve subscribing to the channel and commenting on the video for a chance to win the calculator based on the number of likes on the comment by a specified date. The paragraph ends with a call to action for viewers to participate in the giveaway and share the video.

### Mindmap

### Keywords

### 💡Scientific Calculator

### 💡Quadratic Equation

### 💡Vertex

### 💡System of Equations

### 💡Complex Numbers

### 💡Logarithm

### 💡Inverse Sine

### 💡Summation

### 💡Derivative

### 💡Integral

### Highlights

Tutorial on using the Casio FX-991 EX classwiz calculator for algebra and engineering exams.

The calculator costs approximately $21 after tax at Target.

A giveaway for a calculator is included in the video.

Solving quadratic equations using the calculator's equation mode.

Entering the equation in standard form for the calculator to solve.

Finding the vertex of a parabola using the calculator.

Solving a system of equations with three variables.

Entering coefficients and constants for system of equations.

Calculating complex numbers using the calculator's complex mode.

Entering and solving logarithms with any base on the calculator.

Finding the inverse sine of a fraction using the calculator.

Switching between degree and radian modes for calculations.

Performing summation operations with the calculator.

Calculating the derivative of a function using the calculator.

Converting decimal results to fractions on the calculator.

Calculating integrals with the calculator, including radicals.

Instructions on how to participate in the calculator giveaway.

Encouragement for viewers to comment for a chance to win the calculator.

The importance of creativity and humor in the comments for the giveaway.

The deadline for the giveaway is December 31st, 2016.

A thank you message to viewers for watching the tutorial.