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Which two of the following values are solutions to the quadratic equation below? 𝑥2−3𝑥−3=7x 2 −3x−3=7A

Question

Which two of the following values are solutions to the quadratic equation below?

x^2 - 3x - 3 = 7

A

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Solution

1. Break Down the Problem

To find the solutions to the quadratic equation x23x3=7 x^2 - 3x - 3 = 7 , we first need to rearrange it into standard form by moving all the terms to one side of the equation.

2. Relevant Concepts

The standard form of a quadratic equation is given by: ax2+bx+c=0 ax^2 + bx + c = 0 We will solve for xx using the quadratic formula: x=b±b24ac2a x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}

3. Analysis and Detail

  1. Rearrange the equation: x23x37=0    x23x10=0 x^2 - 3x - 3 - 7 = 0 \implies x^2 - 3x - 10 = 0 Here, we identify a=1a = 1, b=3b = -3, and c=10c = -10.

  2. Calculate the discriminant: D=b24ac=(3)241(10)=9+40=49 D = b^2 - 4ac = (-3)^2 - 4 \cdot 1 \cdot (-10) = 9 + 40 = 49

  3. Apply the quadratic formula: x=(3)±4921=3±72 x = \frac{-(-3) \pm \sqrt{49}}{2 \cdot 1} = \frac{3 \pm 7}{2}

    • For x1x_1: x1=3+72=102=5 x_1 = \frac{3 + 7}{2} = \frac{10}{2} = 5
    • For x2x_2: x2=372=42=2 x_2 = \frac{3 - 7}{2} = \frac{-4}{2} = -2

4. Verify and Summarize

The solutions to the equation x23x10=0x^2 - 3x - 10 = 0 are x=5x = 5 and x=2x = -2. These values have been verified through the calculations.

Final Answer

The two solutions to the quadratic equation x23x3=7x^2 - 3x - 3 = 7 are x=5x = 5 and x=2x = -2.

This problem has been solved

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