Question

The sum of $12abx$, $2a^{2}bx$, $8abx$ and $8a^{2}bx$ is

• A. $20abx$ + $10a^{2}bx$
• B. $10abx$ + $20a^{2}bx$
• C. $30a^3{b}^2{x}^2$
• D. none of the above

Answer 1

The correct option is A

$20abx$ + $10a^{2}bx$

Sum of $12abx$, $2a^{2}bx$, $8abx$ and $8a^{2}bx$ = $12abx$ + $2a^{2}bx$ + $8abx$ + $8a^{2}bx$

= ($12abx$ + $8abx$) + ($2a^{2}bx$ + $8a^{2}bx$)

= $20abx$ + $10a^{2}bx$

This cannot be simplified further as $abx$ and $a^{2}bx$ are unlike terms.