Question

Ab( x+ y) whole square - xy(a + b) whole square

Answer 1

Answer:

= ab(x+y) ^2-xy(a+b) ^2

= ab(x^2+2xy+y^2) -xy(a^2+2ab+b^2)

= abx^2+2abxy+aby^2-a^2xy-2abxy-b^2xy

= abx^2+aby^2-a^2xy-b^2xy

=ab[x^2+y^2]-xy[a^2+b^2]