189=3(x^2+2x)

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Solution for 189=3(x^2+2x) equation:


Simplifying
189 = 3(x2 + 2x)

Reorder the terms:
189 = 3(2x + x2)
189 = (2x * 3 + x2 * 3)
189 = (6x + 3x2)

Solving
189 = 6x + 3x2

Solving for variable 'x'.

Reorder the terms:
189 + -6x + -3x2 = 6x + -6x + 3x2 + -3x2

Combine like terms: 6x + -6x = 0
189 + -6x + -3x2 = 0 + 3x2 + -3x2
189 + -6x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
189 + -6x + -3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(63 + -2x + -1x2) = 0

Factor a trinomial.
3((7 + -1x)(9 + x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Subproblem 2

Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9

Solution

x = {7, -9}

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