Question

Using Identities, find
i) (7a+3b)^2
ii) (206)^2

Answer 1

Answer:

1) (7a + 3b)²

sol. 49a² + 9b² + 42ab

2) (206)²

sol. (200 + 6)²

= 40000 + 36 + 2400

= 42436

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