Math Problem Statement

3x^2 - 4x = 4

Solution

Let's solve the quadratic equation:

3x24x=43x^2 - 4x = 4

Step 1: Bring all terms to one side of the equation.

Subtract 4 from both sides:

3x24x4=03x^2 - 4x - 4 = 0

Step 2: Apply the quadratic formula.

The quadratic formula is:

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

For the equation 3x24x4=03x^2 - 4x - 4 = 0, we have:

  • a=3a = 3
  • b=4b = -4
  • c=4c = -4

Step 3: Plug in the values.

First, calculate the discriminant:

Δ=b24ac=(4)24(3)(4)=16+48=64\Delta = b^2 - 4ac = (-4)^2 - 4(3)(-4) = 16 + 48 = 64

Now, solve for xx:

x=(4)±642(3)=4±86x = \frac{-(-4) \pm \sqrt{64}}{2(3)} = \frac{4 \pm 8}{6}

Step 4: Find the two solutions.

  • For x1x_1:

x1=4+86=126=2x_1 = \frac{4 + 8}{6} = \frac{12}{6} = 2

  • For x2x_2:

x2=486=46=23x_2 = \frac{4 - 8}{6} = \frac{-4}{6} = -\frac{2}{3}

Final solutions:

The solutions are:

x1=2,x2=23x_1 = 2, \quad x_2 = -\frac{2}{3}

Would you like further details or have any questions?

Here are five related questions:

  1. How is the discriminant used to determine the nature of roots?
  2. What are the steps to factor quadratic equations if possible?
  3. Can quadratic equations always be solved using the quadratic formula?
  4. How can we verify solutions by plugging them back into the original equation?
  5. What happens if the discriminant is negative?

Tip: Always simplify the equation as much as possible before applying the quadratic formula.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Equations

Formulas

Quadratic formula: x = (-b ± √(b² - 4ac)) / 2a

Theorems

Discriminant theorem for determining root nature
Quadratic formula theorem

Suitable Grade Level

Grades 9-10