x(x-18)=-9(4x+9)

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Solution for x(x-18)=-9(4x+9) equation:


Simplifying
x(x + -18) = -9(4x + 9)

Reorder the terms:
x(-18 + x) = -9(4x + 9)
(-18 * x + x * x) = -9(4x + 9)
(-18x + x2) = -9(4x + 9)

Reorder the terms:
-18x + x2 = -9(9 + 4x)
-18x + x2 = (9 * -9 + 4x * -9)
-18x + x2 = (-81 + -36x)

Solving
-18x + x2 = -81 + -36x

Solving for variable 'x'.

Reorder the terms:
81 + -18x + 36x + x2 = -81 + -36x + 81 + 36x

Combine like terms: -18x + 36x = 18x
81 + 18x + x2 = -81 + -36x + 81 + 36x

Reorder the terms:
81 + 18x + x2 = -81 + 81 + -36x + 36x

Combine like terms: -81 + 81 = 0
81 + 18x + x2 = 0 + -36x + 36x
81 + 18x + x2 = -36x + 36x

Combine like terms: -36x + 36x = 0
81 + 18x + x2 = 0

Factor a trinomial.
(9 + x)(9 + x) = 0

Subproblem 1

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

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 = {-9, -9}

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