(5x-2)(-5x-4)=

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Solution for (5x-2)(-5x-4)= equation: 


Simplifying
(5x + -2)(-5x + -4) = 0

Reorder the terms:
(-2 + 5x)(-5x + -4) = 0

Reorder the terms:
(-2 + 5x)(-4 + -5x) = 0

Multiply (-2 + 5x) * (-4 + -5x)
(-2(-4 + -5x) + 5x * (-4 + -5x)) = 0
((-4 * -2 + -5x * -2) + 5x * (-4 + -5x)) = 0
((8 + 10x) + 5x * (-4 + -5x)) = 0
(8 + 10x + (-4 * 5x + -5x * 5x)) = 0
(8 + 10x + (-20x + -25x2)) = 0

Combine like terms: 10x + -20x = -10x
(8 + -10x + -25x2) = 0

Solving
8 + -10x + -25x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(2 + -5x)(4 + 5x) = 0


Subproblem 1
Set the factor '(2 + -5x)' equal to zero and attempt to solve:

Simplifying
2 + -5x = 0

Solving
2 + -5x = 0

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

Add '-2' to each side of the equation.
2 + -2 + -5x = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -5x = 0 + -2
-5x = 0 + -2

Combine like terms: 0 + -2 = -2
-5x = -2

Divide each side by '-5'.
x = 0.4

Simplifying
x = 0.4

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 = {0.4, -0.8}

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