Question

plz solve part a) and d)​

Answer 1

1. x^2+5x+5y-y^2

=x^2-y^2+5x+5y

=(x+y)(x-y)+5(x+y)

=(x+y)(x-y+5)

2.x(x-2)-y(y-2)

=x^2-2x-y^2+2y

=x^2-y^2-2x+2y

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

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

Remember a^2-b^2=(a+b)(a-b)