Question

ab(x² + y²) - xy(a² + b²)​

Answer 1

Answer:

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

=abx^2+aby^2-xya^2-xyb^2.

=abx^2 -xya^2+aby^2 -xyb^2.

=ax(bx-ay)+by (ay-bx).

=ax(bx-ay) -by(bx-ay).

=(ax-by) (bx-ay)