Question

From the product (x-2y)(x+y) subtract the product (x+y+1)(x-2y)and then evaluate it for x=-2andy=-1

Answer 1

=x(2x+y)+y(2x+y)+x(x−y)+2y(x−y)

=2x

2

+xy+2xy+y

2

+x

2

−xy+2xy−2y

2

=(2+1)x

2

+(1+2−1+2)xy+(1−2)y

2

=3x

2

+4xy−y

2

Answer 2

Step-by-step explanation:

hope this ans will correct