Question

Using identities expand :

(i) (x + 1/4x)²
(ii) (9a + 5b)² + (9a - 5b)² ​

Answer 1

Answer:

(a+b)^2-a2+2ab+b2

Step-by-step explanation:

(a+b)(a-b)-a3+b2

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Answer 2

Answer:

for 1 part use identity

(a + b)2

1. x2 + 1/16x2 + 2/4 x2

2. use identity

a2 +b2

9a2+5b2