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Simplifying
-5 = x2 + -7
Reorder the terms:
-5 = -7 + x2
Solving
-5 = -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.
-5 + -1x2 = -7 + x2 + -1x2
Combine like terms: x2 + -1x2 = 0
-5 + -1x2 = -7 + 0
-5 + -1x2 = -7
Add '5' to each side of the equation.
-5 + 5 + -1x2 = -7 + 5
Combine like terms: -5 + 5 = 0
0 + -1x2 = -7 + 5
-1x2 = -7 + 5
Combine like terms: -7 + 5 = -2
-1x2 = -2
Divide each side by '-1'.
x2 = 2
Simplifying
x2 = 2
Take the square root of each side:
x = {-1.414213562, 1.414213562}
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