(9+x)(4x-8)=

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Solution for (9+x)(4x-8)= equation: 


Simplifying
(9 + x)(4x + -8) = 0

Reorder the terms:
(9 + x)(-8 + 4x) = 0

Multiply (9 + x) * (-8 + 4x)
(9(-8 + 4x) + x(-8 + 4x)) = 0
((-8 * 9 + 4x * 9) + x(-8 + 4x)) = 0
((-72 + 36x) + x(-8 + 4x)) = 0
(-72 + 36x + (-8 * x + 4x * x)) = 0
(-72 + 36x + (-8x + 4x2)) = 0

Combine like terms: 36x + -8x = 28x
(-72 + 28x + 4x2) = 0

Solving
-72 + 28x + 4x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-18 + 7x + x2) = 0

Factor a trinomial.
4((-9 + -1x)(2 + -1x)) = 0

Ignore the factor 4.

Subproblem 1
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

Subproblem 2
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
Solution
x = {-9, 2}

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