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Simplifying
9x2 + -225 = 0
Reorder the terms:
-225 + 9x2 = 0
Solving
-225 + 9x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '225' to each side of the equation.
-225 + 225 + 9x2 = 0 + 225
Combine like terms: -225 + 225 = 0
0 + 9x2 = 0 + 225
9x2 = 0 + 225
Combine like terms: 0 + 225 = 225
9x2 = 225
Divide each side by '9'.
x2 = 25
Simplifying
x2 = 25
Take the square root of each side:
x = {-5, 5}
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