(4x-3y)(2x+5y)=

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Solution for (4x-3y)(2x+5y)= equation: 


Simplifying
(4x + -3y)(2x + 5y) = 0

Multiply (4x + -3y) * (2x + 5y)
(4x * (2x + 5y) + -3y * (2x + 5y)) = 0
((2x * 4x + 5y * 4x) + -3y * (2x + 5y)) = 0

Reorder the terms:
((20xy + 8x2) + -3y * (2x + 5y)) = 0
((20xy + 8x2) + -3y * (2x + 5y)) = 0
(20xy + 8x2 + (2x * -3y + 5y * -3y)) = 0
(20xy + 8x2 + (-6xy + -15y2)) = 0

Reorder the terms:
(20xy + -6xy + 8x2 + -15y2) = 0

Combine like terms: 20xy + -6xy = 14xy
(14xy + 8x2 + -15y2) = 0

Solving
14xy + 8x2 + -15y2 = 0

Solving for variable 'x'.

Factor a trinomial.
(4x + -3y)(2x + 5y) = 0


Subproblem 1
Set the factor '(4x + -3y)' equal to zero and attempt to solve:

Simplifying
4x + -3y = 0

Solving
4x + -3y = 0

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

Add '3y' to each side of the equation.
4x + -3y + 3y = 0 + 3y

Combine like terms: -3y + 3y = 0
4x + 0 = 0 + 3y
4x = 0 + 3y
Remove the zero:
4x = 3y

Divide each side by '4'.
x = 0.75y

Simplifying
x = 0.75y

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 = {0.75y, -2.5y}

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