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

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


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

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

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

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

Combine like terms: -20x + -8x = -28x
(32 + -28x + 5x2) = 0

Solving
32 + -28x + 5x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(8 + -5x)(4 + -1x) = 0


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

Simplifying
8 + -5x = 0

Solving
8 + -5x = 0

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

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

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

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

Divide each side by '-5'.
x = 1.6

Simplifying
x = 1.6

Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve:

Simplifying
4 + -1x = 0

Solving
4 + -1x = 0

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

Add '-4' to each side of the equation.
4 + -4 + -1x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1x = 0 + -4
-1x = 0 + -4

Combine like terms: 0 + -4 = -4
-1x = -4

Divide each side by '-1'.
x = 4

Simplifying
x = 4
Solution
x = {1.6, 4}

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