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

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


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

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

Reorder the terms:
((6xy + 15x2) + -4y * (5x + 2y)) = 0
((6xy + 15x2) + -4y * (5x + 2y)) = 0
(6xy + 15x2 + (5x * -4y + 2y * -4y)) = 0
(6xy + 15x2 + (-20xy + -8y2)) = 0

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

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

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

Solving for variable 'x'.

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


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

Simplifying
3x + -4y = 0

Solving
3x + -4y = 0

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

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

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

Divide each side by '3'.
x = 1.333333333y

Simplifying
x = 1.333333333y

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

Simplifying
5x + 2y = 0

Solving
5x + 2y = 0

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

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

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

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

Simplifying
x = -0.4y
Solution
x = {1.333333333y, -0.4y}

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