-10=-x^2+10

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Solution for -10=-x^2+10 equation: 


Simplifying
-10 = -1x2 + 10

Reorder the terms:
-10 = 10 + -1x2

Solving
-10 = 10 + -1x2

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add 'x2' to each side of the equation.
-10 + x2 = 10 + -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-10 + x2 = 10 + 0
-10 + x2 = 10

Add '10' to each side of the equation.
-10 + 10 + x2 = 10 + 10

Combine like terms: -10 + 10 = 0
0 + x2 = 10 + 10
x2 = 10 + 10

Combine like terms: 10 + 10 = 20
x2 = 20

Simplifying
x2 = 20

Take the square root of each side:
x = {-4.472135955, 4.472135955}

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