(4x-5y)(5x-y)=

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


Simplifying
(4x + -5y)(5x + -1y) = 0

Multiply (4x + -5y) * (5x + -1y)
(4x * (5x + -1y) + -5y * (5x + -1y)) = 0
((5x * 4x + -1y * 4x) + -5y * (5x + -1y)) = 0

Reorder the terms:
((-4xy + 20x2) + -5y * (5x + -1y)) = 0
((-4xy + 20x2) + -5y * (5x + -1y)) = 0
(-4xy + 20x2 + (5x * -5y + -1y * -5y)) = 0
(-4xy + 20x2 + (-25xy + 5y2)) = 0

Reorder the terms:
(-4xy + -25xy + 20x2 + 5y2) = 0

Combine like terms: -4xy + -25xy = -29xy
(-29xy + 20x2 + 5y2) = 0

Solving
-29xy + 20x2 + 5y2 = 0

Solving for variable 'x'.

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


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

Simplifying
4x + -5y = 0

Solving
4x + -5y = 0

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

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

Combine like terms: -5y + 5y = 0
4x + 0 = 0 + 5y
4x = 0 + 5y
Remove the zero:
4x = 5y

Divide each side by '4'.
x = 1.25y

Simplifying
x = 1.25y

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

Simplifying
5x + -1y = 0

Solving
5x + -1y = 0

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

Add 'y' to each side of the equation.
5x + -1y + y = 0 + y

Combine like terms: -1y + y = 0
5x + 0 = 0 + y
5x = 0 + y
Remove the zero:
5x = y

Divide each side by '5'.
x = 0.2y

Simplifying
x = 0.2y
Solution
x = {1.25y, 0.2y}

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