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Simplifying
x * x + 7 = 408
Multiply x * x
x2 + 7 = 408
Reorder the terms:
7 + x2 = 408
Solving
7 + x2 = 408
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 = 408 + -7
Combine like terms: 7 + -7 = 0
0 + x2 = 408 + -7
x2 = 408 + -7
Combine like terms: 408 + -7 = 401
x2 = 401
Simplifying
x2 = 401
Take the square root of each side:
x = {-20.024984395, 20.024984395}
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