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

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


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

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

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

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

Combine like terms: -40x + 4x = -36x
(-32 + -36x + 5x2) = 0

Solving
-32 + -36x + 5x2 = 0

Solving for variable 'x'.

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

Subproblem 1

Set the factor '(-4 + -5x)' equal to zero and attempt to solve: Simplifying -4 + -5x = 0 Solving -4 + -5x = 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 + -5x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -5x = 0 + 4 -5x = 0 + 4 Combine like terms: 0 + 4 = 4 -5x = 4 Divide each side by '-5'. x = -0.8 Simplifying x = -0.8

Subproblem 2

Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 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 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8

Solution

x = {-0.8, 8}

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