Question

Using identities, evaluate 297 $\times$ 303 = ___

Answer 1

297 = 300 - 3
303 = 300+ 3
$(a-b)(a+b)=a^2-b^2$
$297\times 303=(300-3)(300+3)={300}^2-3^2$
$=90000-9$
$=89991$