Question

6. What should be added to 9x2 + 7xy - 3y2 to get
16x2 – 872 -9xy?​

Answer 1

Let the number be x.

A/Q, (9x2 + 7xy - 3y2)+x=16x2 – 872 -9xy

or, (18+7xy - 3y2) + x=32- 872 -9xy

or, 18+ 7xy -3y2+x = 32- 872-9xy

or, 18-32+7xy+9xy-872-3y2=x

or, x=-904+18+16xy-3y2

or, x=896+16xy-3y2

therefore, x= 16xy-3y2+896

Required no. = 16xy-3y2+896