Question

expand and simplify 2(-x-y)-(2x-y)

Answer 1

Answer:

Step-by-step explanation:

2

x

(

2

x

)

+

2

x

(

−

y

)

+

y

(

2

x

)

+

y

(

−

y

)4

x

2

−

y

2

Answer 2

Answer:

(x+y)(2x+y)+(x+2y)(x−y)

=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