Question

Find the difference.


`(3s^(2) +2st+5t^(2) )-(-2s^(2) +st+7t^(2) )`

Possible Answers:
A:
`5s^(2) +st-2t^(2)`
B:
`s^(2) +st-2t^(2)`
C:
`5s^(2) +3st+12t^(2)`
D:
`s^(2) +3st+12t^(2)`

Answer 1

the answer is letter A: 5s^2+st-2t^2