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

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


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

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

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

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

Combine like terms: 25x + -20x = 5x
(-20 + 5x + 25x2) = 0

Solving
-20 + 5x + 25x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '5'.
5(-4 + x + 5x2) = 0

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

Ignore the factor 5.

Subproblem 1

Set the factor '(-1 + -1x)' equal to zero and attempt to solve: Simplifying -1 + -1x = 0 Solving -1 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -1x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1x = 0 + 1 -1x = 0 + 1 Combine like terms: 0 + 1 = 1 -1x = 1 Divide each side by '-1'. x = -1 Simplifying x = -1

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, 0.8}

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