Question

Using identities, evaluate $297\times 303$

• A. $8999$
• B. $899$
• C. $89991$
• D. $89990$

Answer 1

Answer: (C)

$89991$

$\left(297\right)\left(303\right)$
$=(300-3)(300+3)$
Using ,
$(a-b)(a+b)=a^2-b^2$ we get,
$(300{)}^2-(3{)}^2$
$=90000-9$
$=89991$