Question

2) Expand ( a + 2b)2​

Answer 1

Answer:

Using Identity 1st:- (a+b)²= a²+b²+2ab

Here, a= a and b= 2b

(a)²+ (2b)²+(2×a×2b)

a²+4b²+4ab

Answer 2

Answer:

(a_2b)2

(a)2+(2ab)2-2X2X2b

=a2+4b2_4ab.