(4x-9)(8x+5)=

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Solution for (4x-9)(8x+5)= equation: 


Simplifying
(4x + -9)(8x + 5) = 0

Reorder the terms:
(-9 + 4x)(8x + 5) = 0

Reorder the terms:
(-9 + 4x)(5 + 8x) = 0

Multiply (-9 + 4x) * (5 + 8x)
(-9(5 + 8x) + 4x * (5 + 8x)) = 0
((5 * -9 + 8x * -9) + 4x * (5 + 8x)) = 0
((-45 + -72x) + 4x * (5 + 8x)) = 0
(-45 + -72x + (5 * 4x + 8x * 4x)) = 0
(-45 + -72x + (20x + 32x2)) = 0

Combine like terms: -72x + 20x = -52x
(-45 + -52x + 32x2) = 0

Solving
-45 + -52x + 32x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-5 + -8x)(9 + -4x) = 0


Subproblem 1
Set the factor '(-5 + -8x)' equal to zero and attempt to solve:

Simplifying
-5 + -8x = 0

Solving
-5 + -8x = 0

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

Add '5' to each side of the equation.
-5 + 5 + -8x = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -8x = 0 + 5
-8x = 0 + 5

Combine like terms: 0 + 5 = 5
-8x = 5

Divide each side by '-8'.
x = -0.625

Simplifying
x = -0.625

Subproblem 2
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
Solution
x = {-0.625, 2.25}

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