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Simplifying
5x2 + -9 = 321
Reorder the terms:
-9 + 5x2 = 321
Solving
-9 + 5x2 = 321
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '9' to each side of the equation.
-9 + 9 + 5x2 = 321 + 9
Combine like terms: -9 + 9 = 0
0 + 5x2 = 321 + 9
5x2 = 321 + 9
Combine like terms: 321 + 9 = 330
5x2 = 330
Divide each side by '5'.
x2 = 66
Simplifying
x2 = 66
Take the square root of each side:
x = {-8.124038405, 8.124038405}
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