=3x^2-9x

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Solution for =3x^2-9x equation:


Simplifying
0 = 3x2 + -9x

Reorder the terms:
0 = -9x + 3x2

Solving
0 = -9x + 3x2

Solving for variable 'x'.
Remove the zero:
9x + -3x2 = -9x + 3x2 + 9x + -3x2

Reorder the terms:
9x + -3x2 = -9x + 9x + 3x2 + -3x2

Combine like terms: -9x + 9x = 0
9x + -3x2 = 0 + 3x2 + -3x2
9x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
9x + -3x2 = 0

Factor out the Greatest Common Factor (GCF), '3x'.
3x(3 + -1x) = 0

Ignore the factor 3.

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {0, 3}

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