3x(2x+1)=18

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Solution for 3x(2x+1)=18 equation:


Simplifying
3x(2x + 1) = 18

Reorder the terms:
3x(1 + 2x) = 18
(1 * 3x + 2x * 3x) = 18
(3x + 6x2) = 18

Solving
3x + 6x2 = 18

Solving for variable 'x'.

Reorder the terms:
-18 + 3x + 6x2 = 18 + -18

Combine like terms: 18 + -18 = 0
-18 + 3x + 6x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-6 + x + 2x2) = 0

Factor a trinomial.
3((-2 + -1x)(3 + -2x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2

Subproblem 2

Set the factor '(3 + -2x)' equal to zero and attempt to solve: Simplifying 3 + -2x = 0 Solving 3 + -2x = 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 + -2x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -2x = 0 + -3 -2x = 0 + -3 Combine like terms: 0 + -3 = -3 -2x = -3 Divide each side by '-2'. x = 1.5 Simplifying x = 1.5

Solution

x = {-2, 1.5}

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