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Simplifying
x2 + 3x + -225 = 3x
Reorder the terms:
-225 + 3x + x2 = 3x
Add '-3x' to each side of the equation.
-225 + 3x + -3x + x2 = 3x + -3x
Combine like terms: 3x + -3x = 0
-225 + 0 + x2 = 3x + -3x
-225 + x2 = 3x + -3x
Combine like terms: 3x + -3x = 0
-225 + x2 = 0
Solving
-225 + x2 = 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 + x2 = 0 + 225
Combine like terms: -225 + 225 = 0
0 + x2 = 0 + 225
x2 = 0 + 225
Combine like terms: 0 + 225 = 225
x2 = 225
Simplifying
x2 = 225
Take the square root of each side:
x = {-15, 15}
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