Question

(a+3b)2+(a-3b)2=? Find the value of the given expression by using algebraic identities.

Answer 1

Step-by-step explanation:

(x+y)²+(x-y)²=2(x²+y²)

x=a and y=3b

(a+3b)²+(a-3b)²=2(a²+9b²)