Question

salina and nessa combined like terms using the same expression salinas answer differs from nessas the table shows both of their solutions

Answer 1

A

Explanation:

Consider the expression

`6x^2y-3+x^2y+2xy^2+2xy-6`

which both girls are given.

In this expression there are like terms:

• 
  `6x^2y` and
  `x^2y;`
• 
  `-3` and
  `-6.`

Combine the like terms:

`6x^2y+x^2y=7x^2y;`

`-3+(-6)=-9`

So,

`6x^2y-3+x^2y+2xy^2+2xy-6=7x^2y +2xy^2+2xy-9`

Correct option is A, Salina combined the
`x^2y` terms correctly, but then left
`+x^2y` term in her answer.