Question

Evaluate using suitableIdentities. (2a + 7) (2a – 7).​

Answer 1

Answer:

4a^2-49.

Step-by-step explanation:

given, (2a+7) (2a-7)

= (2a) ^2-7^2 [ since (a+b) (a-b) =a^2 - b^2]

= 4a^2-49.

hope this helps you...