Question

please factorise it ​

Answer 1

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

=> abx^2+ aby^2 - a^2xy - xyb^2

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

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

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

Answer 2

HERE IS YOUR ANSWER:

=ab(x²+y²)-xy(a²+b²)

=abx²+aby²-a²xy-xyb²

=abx²+aby²-a²xy-b²xy

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

(ax-by)(bx-ay)

希望这对您有帮助