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

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


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

Multiply (2x + 5y) * (x + -2y)
(2x * (x + -2y) + 5y * (x + -2y)) = 0
((x * 2x + -2y * 2x) + 5y * (x + -2y)) = 0

Reorder the terms:
((-4xy + 2x2) + 5y * (x + -2y)) = 0
((-4xy + 2x2) + 5y * (x + -2y)) = 0
(-4xy + 2x2 + (x * 5y + -2y * 5y)) = 0
(-4xy + 2x2 + (5xy + -10y2)) = 0

Reorder the terms:
(-4xy + 5xy + 2x2 + -10y2) = 0

Combine like terms: -4xy + 5xy = 1xy
(1xy + 2x2 + -10y2) = 0

Solving
1xy + 2x2 + -10y2 = 0

Solving for variable 'x'.

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


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

Simplifying
x + -2y = 0

Solving
x + -2y = 0

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

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

Combine like terms: -2y + 2y = 0
x + 0 = 0 + 2y
x = 0 + 2y
Remove the zero:
x = 2y

Simplifying
x = 2y

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

Simplifying
2x + 5y = 0

Solving
2x + 5y = 0

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

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

Combine like terms: 5y + -5y = 0
2x + 0 = 0 + -5y
2x = 0 + -5y
Remove the zero:
2x = -5y

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

Simplifying
x = -2.5y
Solution
x = {2y, -2.5y}

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