3x^2+18x=120

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Solution for 3x^2+18x=120 equation:


Simplifying
3x2 + 18x = 120

Reorder the terms:
18x + 3x2 = 120

Solving
18x + 3x2 = 120

Solving for variable 'x'.

Reorder the terms:
-120 + 18x + 3x2 = 120 + -120

Combine like terms: 120 + -120 = 0
-120 + 18x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-40 + 6x + x2) = 0

Factor a trinomial.
3((-10 + -1x)(4 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-10 + -1x)' equal to zero and attempt to solve: Simplifying -10 + -1x = 0 Solving -10 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + -1x = 0 + 10 Combine like terms: -10 + 10 = 0 0 + -1x = 0 + 10 -1x = 0 + 10 Combine like terms: 0 + 10 = 10 -1x = 10 Divide each side by '-1'. x = -10 Simplifying x = -10

Subproblem 2

Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-10, 4}

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