(2y-5)(5y-2y+2y+4)=

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Solution for (2y-5)(5y-2y+2y+4)= equation: 


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

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

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

Combine like terms: 5y + -2y = 3y
(-5 + 2y)(4 + 3y + 2y) = 0

Combine like terms: 3y + 2y = 5y
(-5 + 2y)(4 + 5y) = 0

Multiply (-5 + 2y) * (4 + 5y)
(-5(4 + 5y) + 2y * (4 + 5y)) = 0
((4 * -5 + 5y * -5) + 2y * (4 + 5y)) = 0
((-20 + -25y) + 2y * (4 + 5y)) = 0
(-20 + -25y + (4 * 2y + 5y * 2y)) = 0
(-20 + -25y + (8y + 10y2)) = 0

Combine like terms: -25y + 8y = -17y
(-20 + -17y + 10y2) = 0

Solving
-20 + -17y + 10y2 = 0

Solving for variable 'y'.

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


Subproblem 1
Set the factor '(-4 + -5y)' equal to zero and attempt to solve:

Simplifying
-4 + -5y = 0

Solving
-4 + -5y = 0

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

Add '4' to each side of the equation.
-4 + 4 + -5y = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -5y = 0 + 4
-5y = 0 + 4

Combine like terms: 0 + 4 = 4
-5y = 4

Divide each side by '-5'.
y = -0.8

Simplifying
y = -0.8

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

Simplifying
5 + -2y = 0

Solving
5 + -2y = 0

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

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

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

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

Divide each side by '-2'.
y = 2.5

Simplifying
y = 2.5
Solution
y = {-0.8, 2.5}

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