Question

How to do this please explain.
Answer correctly please​

Answer 1

Answer:

in the no 1 question subtract the second one with the first one

(2x^2 + 3xy) - (x^2+xy+y^2)

= x^2 + 2xy-y^2

and in no 2 question

-3a+7b+16-2a-8b-10

=-5a-b+6

Answer 2

Step-by-step explanation:

(x² + xy + y²) + Expression = (2x² + 3xy)

Expression = (2x² + 3xy) - (x² + xy + y²)

Putting like terms below like terms and subtracting them

2x² + 3xy

x² + xy + y²

(-) (-) (-)

_____________

x² + 2xy-y²

_____________

Answer is x² + 2xy - y²