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Simplifying
x2 + -7 + -8 = 0
Reorder the terms:
-7 + -8 + x2 = 0
Combine like terms: -7 + -8 = -15
-15 + x2 = 0
Solving
-15 + x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '15' to each side of the equation.
-15 + 15 + x2 = 0 + 15
Combine like terms: -15 + 15 = 0
0 + x2 = 0 + 15
x2 = 0 + 15
Combine like terms: 0 + 15 = 15
x2 = 15
Simplifying
x2 = 15
Take the square root of each side:
x = {-3.872983346, 3.872983346}
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