Question

Multiply: $a+b,7a^2{b}^2$

• A. $a^3{b}^6+a^2{b}^3$
• B. $7a^3{b}^2+7a^2{b}^3$
• C. $7a^5{b}^2+3a^2{b}^3$
• D. $a^3{b}^2+7a3b^3$

Answer 1

The correct option is B $7a^3{b}^2+7a^2{b}^3$

$a+b,7a^2{b}^2$
$=(a+b)\times \left(7a^2{b}^2\right)$
$=7a^3{b}^2+7a^2{b}^3$