Math Problem Statement

3x2-6x+11=0

Solution

The equation is:

3x26x+11=03x^2 - 6x + 11 = 0

This is a quadratic equation. To solve it, we can use the quadratic formula:

x=b±b24ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}

Here, a=3a = 3, b=6b = -6, and c=11c = 11.

Step 1: Calculate the discriminant (Δ\Delta)

Δ=b24ac\Delta = b^2 - 4ac Δ=(6)24(3)(11)\Delta = (-6)^2 - 4(3)(11) Δ=36132=96\Delta = 36 - 132 = -96

Step 2: Analyze the discriminant

Since Δ<0\Delta < 0, the roots are complex numbers.

Step 3: Solve for xx

The formula for complex roots is: x=b±iΔ2ax = \frac{-b \pm i\sqrt{|\Delta|}}{2a} Substitute the values: x=(6)±i962(3)x = \frac{-(-6) \pm i\sqrt{96}}{2(3)} x=6±i966x = \frac{6 \pm i\sqrt{96}}{6}

Simplify further: 96=166=46\sqrt{96} = \sqrt{16 \cdot 6} = 4\sqrt{6} x=6±i466x = \frac{6 \pm i \cdot 4\sqrt{6}}{6} x=1±2i63x = 1 \pm \frac{2i\sqrt{6}}{3}

Final Answer:

The solutions are: x=1+2i63,x=12i63x = 1 + \frac{2i\sqrt{6}}{3}, \quad x = 1 - \frac{2i\sqrt{6}}{3}


Do you want more details or clarification? 😊
Here are 5 related questions for you to explore further:

  1. What does the discriminant tell us about the nature of the roots?
  2. How can we represent complex roots graphically?
  3. Can you solve another quadratic equation with different coefficients?
  4. How is the quadratic formula derived from completing the square?
  5. What are some real-world applications of quadratic equations?

Tip: Always check the discriminant first to determine the nature of the roots before solving!

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Equations
Complex Numbers

Formulas

Quadratic formula: x = (-b ± √(b² - 4ac)) / 2a
Complex roots formula: x = (-b ± i√|Δ|) / 2a

Theorems

Quadratic Formula
Discriminant Analysis

Suitable Grade Level

Grades 9-12