Question

find the product of : (xy-ab) and (xy+ab)​

Answer 1

Answer:

(i) (xy – ab) × (xy + ab)

= xy.(xy – ab) + ab(xy – ab)

= x2y2 – abxy + abxy – a2b2

= x2y2 – a2b2

Answer 2

Answer:

product of (xy-ab) and (xy+ab)

= (xy-ab) × (xy+ab)

= xy(xy + ab) - ab(xy + ab)

= x²y² + xyab - xyab - a²b²

= x²y² - a²b².