(x+y)(2x+y)+(x+2y)(x-y) give ansewe steo by step
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(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+x²+xy-xy+2xy+2xy+y²-2y²
=3x²+4xy-y²
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