Question

Expand using identity (3ab-4xy)^2

Answer 1

Answer:

= let us assume that a=3ab , b= 4xy

= (a-b)^2 = a^2 +b^2 - 2ab

= (3ab)^2 +(4xy)^2 - 2× 3ab × 4xy

= 9(ab)^2 + 16(xy)^2 - 12abxy

= 9a^2 b^2 + 16x^2 y^2 - 12abxy

Hope this may be helpful