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Simplifying
1 + x2 + -2 = 7
Reorder the terms:
1 + -2 + x2 = 7
Combine like terms: 1 + -2 = -1
-1 + x2 = 7
Solving
-1 + x2 = 7
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '1' to each side of the equation.
-1 + 1 + x2 = 7 + 1
Combine like terms: -1 + 1 = 0
0 + x2 = 7 + 1
x2 = 7 + 1
Combine like terms: 7 + 1 = 8
x2 = 8
Simplifying
x2 = 8
Take the square root of each side:
x = {-2.828427125, 2.828427125}
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