(4x-5)(8x+7)=0

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Solution for (4x-5)(8x+7)=0 equation: 


Simplifying
(4x + -5)(8x + 7) = 0

Reorder the terms:
(-5 + 4x)(8x + 7) = 0

Reorder the terms:
(-5 + 4x)(7 + 8x) = 0

Multiply (-5 + 4x) * (7 + 8x)
(-5(7 + 8x) + 4x * (7 + 8x)) = 0
((7 * -5 + 8x * -5) + 4x * (7 + 8x)) = 0
((-35 + -40x) + 4x * (7 + 8x)) = 0
(-35 + -40x + (7 * 4x + 8x * 4x)) = 0
(-35 + -40x + (28x + 32x2)) = 0

Combine like terms: -40x + 28x = -12x
(-35 + -12x + 32x2) = 0

Solving
-35 + -12x + 32x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-7 + -8x)(5 + -4x) = 0


Subproblem 1
Set the factor '(-7 + -8x)' equal to zero and attempt to solve:

Simplifying
-7 + -8x = 0

Solving
-7 + -8x = 0

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

Add '7' to each side of the equation.
-7 + 7 + -8x = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -8x = 0 + 7
-8x = 0 + 7

Combine like terms: 0 + 7 = 7
-8x = 7

Divide each side by '-8'.
x = -0.875

Simplifying
x = -0.875

Subproblem 2
Set the factor '(5 + -4x)' equal to zero and attempt to solve:

Simplifying
5 + -4x = 0

Solving
5 + -4x = 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 + -4x = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -4x = 0 + -5
-4x = 0 + -5

Combine like terms: 0 + -5 = -5
-4x = -5

Divide each side by '-4'.
x = 1.25

Simplifying
x = 1.25
Solution
x = {-0.875, 1.25}

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