Question

Using identities evaluate (a) (501)² (b) (98)² (c) 47² - 37²​

Answer 1

${(501)}^{2} = {(500 + 1)}^{2} \\ {(500)}^{2} + 2 \times 500 \times 1 + {(1)}^{2} \\ 250000 + 1000 + 1 \\ 251001$

${(98)}^{2} = {(100 - 2)}^{2} \\ {(100)}^{2} - 2 \times 100 \times 2 + {(2)}^{2} \\ 10000 - 400 + 4 \\ 9604$

${(47)}^{2} - {(37)}^{2} \\ (47 - 37)(47 + 37) \\ 10 \times 84 \\ 840$

u'r done!!

Thnx✌️♥️~