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

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


Simplifying
(x + -1y)(x + 2y) = 0

Multiply (x + -1y) * (x + 2y)
(x(x + 2y) + -1y * (x + 2y)) = 0
((x * x + 2y * x) + -1y * (x + 2y)) = 0

Reorder the terms:
((2xy + x2) + -1y * (x + 2y)) = 0
((2xy + x2) + -1y * (x + 2y)) = 0
(2xy + x2 + (x * -1y + 2y * -1y)) = 0
(2xy + x2 + (-1xy + -2y2)) = 0

Reorder the terms:
(2xy + -1xy + x2 + -2y2) = 0

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

Solving
1xy + x2 + -2y2 = 0

Solving for variable 'x'.

Factor a trinomial.
(x + -1y)(x + 2y) = 0

Subproblem 1

Set the factor '(x + -1y)' equal to zero and attempt to solve: Simplifying x + -1y = 0 Solving x + -1y = 0 Move all terms containing x to the left, all other terms to the right. Add 'y' to each side of the equation. x + -1y + y = 0 + y Combine like terms: -1y + y = 0 x + 0 = 0 + y x = 0 + y Remove the zero: x = y Simplifying x = y

Subproblem 2

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

Solution

x = {y, -2y}

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