how do you solve x²+2x=10?

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David Shabazi Profile
David Shabazi answered

Move all of the terms to one side so that it is all equal to zero, in which you'll get x^2 + 2x - 10 = 0. Then use the quadratic formula.

The quadratic formula states that x=frac{-b pm sqrt {b^2-4ac}}{2a}

The constant in front of x^2 is 1, so a = 1. The constant in front of x is 2, so b = 2. And then c is -10. After figuring out the three values, a, b, and c, plug them into the equation.

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

Your answers should be: -1 ± sqrt(44)/2

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