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

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


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

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

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

Multiply (-4 + 5x) * (8 + 5x)
(-4(8 + 5x) + 5x * (8 + 5x)) = 0
((8 * -4 + 5x * -4) + 5x * (8 + 5x)) = 0
((-32 + -20x) + 5x * (8 + 5x)) = 0
(-32 + -20x + (8 * 5x + 5x * 5x)) = 0
(-32 + -20x + (40x + 25x2)) = 0

Combine like terms: -20x + 40x = 20x
(-32 + 20x + 25x2) = 0

Solving
-32 + 20x + 25x2 = 0

Solving for variable 'x'.

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

Solution

x = {-1.6, 0.8}

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