(2x-9)(x+6)-x(x+6)=0

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Solution for (2x-9)(x+6)-x(x+6)=0 equation:


Simplifying
(2x + -9)(x + 6) + -1x(x + 6) = 0

Reorder the terms:
(-9 + 2x)(x + 6) + -1x(x + 6) = 0

Reorder the terms:
(-9 + 2x)(6 + x) + -1x(x + 6) = 0

Multiply (-9 + 2x) * (6 + x)
(-9(6 + x) + 2x * (6 + x)) + -1x(x + 6) = 0
((6 * -9 + x * -9) + 2x * (6 + x)) + -1x(x + 6) = 0
((-54 + -9x) + 2x * (6 + x)) + -1x(x + 6) = 0
(-54 + -9x + (6 * 2x + x * 2x)) + -1x(x + 6) = 0
(-54 + -9x + (12x + 2x2)) + -1x(x + 6) = 0

Combine like terms: -9x + 12x = 3x
(-54 + 3x + 2x2) + -1x(x + 6) = 0

Reorder the terms:
-54 + 3x + 2x2 + -1x(6 + x) = 0
-54 + 3x + 2x2 + (6 * -1x + x * -1x) = 0
-54 + 3x + 2x2 + (-6x + -1x2) = 0

Reorder the terms:
-54 + 3x + -6x + 2x2 + -1x2 = 0

Combine like terms: 3x + -6x = -3x
-54 + -3x + 2x2 + -1x2 = 0

Combine like terms: 2x2 + -1x2 = 1x2
-54 + -3x + 1x2 = 0

Solving
-54 + -3x + 1x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-6 + -1x)(9 + -1x) = 0

Subproblem 1

Set the factor '(-6 + -1x)' equal to zero and attempt to solve: Simplifying -6 + -1x = 0 Solving -6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1x = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1x = 0 + 6 -1x = 0 + 6 Combine like terms: 0 + 6 = 6 -1x = 6 Divide each side by '-1'. x = -6 Simplifying x = -6

Subproblem 2

Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 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 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9

Solution

x = {-6, 9}

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