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

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Solution for (8x-8)(4x+9)=0 equation: 


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

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

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

Multiply (-8 + 8x) * (9 + 4x)
(-8(9 + 4x) + 8x * (9 + 4x)) = 0
((9 * -8 + 4x * -8) + 8x * (9 + 4x)) = 0
((-72 + -32x) + 8x * (9 + 4x)) = 0
(-72 + -32x + (9 * 8x + 4x * 8x)) = 0
(-72 + -32x + (72x + 32x2)) = 0

Combine like terms: -32x + 72x = 40x
(-72 + 40x + 32x2) = 0

Solving
-72 + 40x + 32x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '8'.
8(-9 + 5x + 4x2) = 0

Factor a trinomial.
8((-9 + -4x)(1 + -1x)) = 0

Ignore the factor 8.

Subproblem 1
Set the factor '(-9 + -4x)' equal to zero and attempt to solve:

Simplifying
-9 + -4x = 0

Solving
-9 + -4x = 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 + -4x = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -4x = 0 + 9
-4x = 0 + 9

Combine like terms: 0 + 9 = 9
-4x = 9

Divide each side by '-4'.
x = -2.25

Simplifying
x = -2.25

Subproblem 2
Set the factor '(1 + -1x)' equal to zero and attempt to solve:

Simplifying
1 + -1x = 0

Solving
1 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + -1x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -1x = 0 + -1
-1x = 0 + -1

Combine like terms: 0 + -1 = -1
-1x = -1

Divide each side by '-1'.
x = 1

Simplifying
x = 1
Solution
x = {-2.25, 1}

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