Question

How do you simplify `(2x^2 + xy + 3y^2) - (x^2 - xy + 2y^2)`?

Answer 1

`=color(red)( x^2 +2xy + y^2`

Explanation:

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

Grouping like terms

`(2x^2 - x^2) +(xy +xy) +(3y^2 -2y^2)`
`=color(red)( x^2 +2xy + y^2`