x^2-7=77

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Solution for x^2-7=77 equation: 


Simplifying
x2 + -7 = 77

Reorder the terms:
-7 + x2 = 77

Solving
-7 + x2 = 77

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + x2 = 77 + 7

Combine like terms: -7 + 7 = 0
0 + x2 = 77 + 7
x2 = 77 + 7

Combine like terms: 77 + 7 = 84
x2 = 84

Simplifying
x2 = 84

Take the square root of each side:
x = {-9.16515139, 9.16515139}

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