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Simplifying
x * x + 4 = 72
Multiply x * x
x2 + 4 = 72
Reorder the terms:
4 + x2 = 72
Solving
4 + x2 = 72
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-4' to each side of the equation.
4 + -4 + x2 = 72 + -4
Combine like terms: 4 + -4 = 0
0 + x2 = 72 + -4
x2 = 72 + -4
Combine like terms: 72 + -4 = 68
x2 = 68
Simplifying
x2 = 68
Take the square root of each side:
x = {-8.246211251, 8.246211251}
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