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Simplifying
8 = x2 + -7
Reorder the terms:
8 = -7 + x2
Solving
8 = -7 + x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-1x2' to each side of the equation.
8 + -1x2 = -7 + x2 + -1x2
Combine like terms: x2 + -1x2 = 0
8 + -1x2 = -7 + 0
8 + -1x2 = -7
Add '-8' to each side of the equation.
8 + -8 + -1x2 = -7 + -8
Combine like terms: 8 + -8 = 0
0 + -1x2 = -7 + -8
-1x2 = -7 + -8
Combine like terms: -7 + -8 = -15
-1x2 = -15
Divide each side by '-1'.
x2 = 15
Simplifying
x2 = 15
Take the square root of each side:
x = {-3.872983346, 3.872983346}
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