Question

Find the following using suitable identity.
(i) (2a + b) (2a - b)
(ii) (101)²​

Answer 1

Answer:

$(2a + b)(2a - b) = {2a }^{2} - {b}^{2} \\ ({101}^{2}) =( {100 + 1)}^{2} \\ = {100 }^{2} + {1}^{2} + 2(100)(1) \\ = 10000 + 1 + 200 \\ = 10201$

Step-by-step explanation:

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Answer 2

(i)

$2a ^{2} - b ^{2}$

(ii) 10201

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