Question

Expand using suitable identities: (2a + ½)²​

Answer 1

Answer:

Identity : (a + b)^2 = a^2 + 2ab + b^2

Question: (2a+1)^2

where a = 2a and b = 1 as per the question.

So, (2a + 1)^2 = (2a)^2 + 2(2a)(1) + 1^2

= 4a^2 + 4a + 1

Therefore, the expansion of (2a + 1)^2 is 4a^2 + 4a + 1.

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Step-by-step explanation: