What has to be added to (a +b) to get (3a +2b)?
What has to be added to (a+b) to get (3a+2b)?
(a) What should be added to x2 + xy + y2 to obtain 2x2 + 3xy?
(b) What should be subtracted from 2a + 8b + 10 to get − 3a + 7b + 16?