Question

(x+y)(2x+y)+(x+2y)(x-y) ​

Answer 1

Answer:

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

[(x * 2x + y)+(y * 2x + y)]+[(x * x-y)+(2y * x-y)]

[2x2 + xy + 2xy + y2]+[x2- xy + 2xy - 2y2]

2x2 + 3xy + y2 + x2 + xy - 2y2

3x2 + 4xy - y2