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Simplifying
320 = x * x + 4
Multiply x * x
320 = x2 + 4
Reorder the terms:
320 = 4 + x2
Solving
320 = 4 + x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-1x2' to each side of the equation.
320 + -1x2 = 4 + x2 + -1x2
Combine like terms: x2 + -1x2 = 0
320 + -1x2 = 4 + 0
320 + -1x2 = 4
Add '-320' to each side of the equation.
320 + -320 + -1x2 = 4 + -320
Combine like terms: 320 + -320 = 0
0 + -1x2 = 4 + -320
-1x2 = 4 + -320
Combine like terms: 4 + -320 = -316
-1x2 = -316
Divide each side by '-1'.
x2 = 316
Simplifying
x2 = 316
Take the square root of each side:
x = {-17.776388835, 17.776388835}
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