Question

11.Using suitable identity find i)68²​

Answer 1

Step-by-step explanation:

$Using \: \: the \: \: identity \\ {(a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab \\ \\ {68}^{2} \\ = {(60 + 8)}^{2} \\ = {(60)}^{2} + {8}^{2} + 2(60)(8) \\ = 3600 + 64 + 960 \\ = \underline{ \underline{4624}}$