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

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


Simplifying
(2x + y)(x + -1y) + (3x + y) = 0

Multiply (2x + y) * (x + -1y)
(2x * (x + -1y) + y(x + -1y)) + (3x + y) = 0
((x * 2x + -1y * 2x) + y(x + -1y)) + (3x + y) = 0

Reorder the terms:
((-2xy + 2x2) + y(x + -1y)) + (3x + y) = 0
((-2xy + 2x2) + y(x + -1y)) + (3x + y) = 0
(-2xy + 2x2 + (x * y + -1y * y)) + (3x + y) = 0
(-2xy + 2x2 + (xy + -1y2)) + (3x + y) = 0

Reorder the terms:
(-2xy + xy + 2x2 + -1y2) + (3x + y) = 0

Combine like terms: -2xy + xy = -1xy
(-1xy + 2x2 + -1y2) + (3x + y) = 0

Remove parenthesis around (3x + y)
-1xy + 2x2 + -1y2 + 3x + y = 0

Reorder the terms:
3x + -1xy + 2x2 + y + -1y2 = 0

Solving
3x + -1xy + 2x2 + y + -1y2 = 0

Solving for variable 'x'.

The solution to this equation could not be determined.

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