Question

Carry out the multiplication of the given expressions.

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

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

Answer 1

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

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

Product$=(a+b)\times 7a^2{b}^2$

$=(a\times 7a^2{b}^2)+(b\times 7a^2{b}^2)$

$=7a^3{b}^2+7a^2{b}^3$