Question

16x²-9(x-y)² =
tolong pakai caranya gan

Answer 1

16x^2 - 9 {(x - y)(x -y)}
=16x^2 - 9 { x^2 - xy - xy + y^2}
=16x^2 - 9 { x^2 - 2xy + y^2}
= 16x^2 - 9x^2 + 18xy - 9y^2
= 7x^2 + 18xy - 9y^2