Question

find the value of (2xy+5y)² by using the identity (a+b)²​

Answer 1

Answer:

using identity - ( a + b) *2 = a sq. + b sq. + 2ab

solution = here a = 2xy , b = 5y

= ( 2xy) sq. + (5y) sq. + 2 × 2xy ×5y

4xy sq. + 25 y *2 + 20 x y*2