3x*x-18x+15=180

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Solution for 3x*x-18x+15=180 equation:


Simplifying
3x * x + -18x + 15 = 180

Multiply x * x
3x2 + -18x + 15 = 180

Reorder the terms:
15 + -18x + 3x2 = 180

Solving
15 + -18x + 3x2 = 180

Solving for variable 'x'.

Reorder the terms:
15 + -180 + -18x + 3x2 = 180 + -180

Combine like terms: 15 + -180 = -165
-165 + -18x + 3x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-165 + -18x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-55 + -6x + x2) = 0

Factor a trinomial.
3((-5 + -1x)(11 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5

Subproblem 2

Set the factor '(11 + -1x)' equal to zero and attempt to solve: Simplifying 11 + -1x = 0 Solving 11 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + -1x = 0 + -11 Combine like terms: 11 + -11 = 0 0 + -1x = 0 + -11 -1x = 0 + -11 Combine like terms: 0 + -11 = -11 -1x = -11 Divide each side by '-1'. x = 11 Simplifying x = 11

Solution

x = {-5, 11}

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