(x+3)(x-6)=4x

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Solution for (x+3)(x-6)=4x equation: 


Simplifying
(x + 3)(x + -6) = 4x

Reorder the terms:
(3 + x)(x + -6) = 4x

Reorder the terms:
(3 + x)(-6 + x) = 4x

Multiply (3 + x) * (-6 + x)
(3(-6 + x) + x(-6 + x)) = 4x
((-6 * 3 + x * 3) + x(-6 + x)) = 4x
((-18 + 3x) + x(-6 + x)) = 4x
(-18 + 3x + (-6 * x + x * x)) = 4x
(-18 + 3x + (-6x + x2)) = 4x

Combine like terms: 3x + -6x = -3x
(-18 + -3x + x2) = 4x

Solving
-18 + -3x + x2 = 4x

Solving for variable 'x'.

Reorder the terms:
-18 + -3x + -4x + x2 = 4x + -4x

Combine like terms: -3x + -4x = -7x
-18 + -7x + x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
-18 + -7x + x2 = 0

Factor a trinomial.
(-2 + -1x)(9 + -1x) = 0


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 '(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 = {-2, 9}

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