Question

1) What should be subtracted from 7x²-2y²-6xy+4 to get 2y²+2x²-1+2xy?​

Answer 1

Answer:

Let 'x' be the required expression .

Then we have,

7x²-2y²-6xy+4 -x = 2y²+2x²-1+2xy

x= (7x²-2y²-6xy+4) -(2y²+2x²-1+2xy)

x=7x²-2y²-6xy+4 - 2y²-2x²+1-2xy

x=7x²-2x²-2y²-2y²-6xy-2xy+4-1

x= 5x²-4y²-8xy+3

Answer 2

Let 'x' be the required expression .

Then we have,

7x²-2y²-6xy+4 -x = 2y²+2x²-1+2xy

x= 7x²-2y²-6xy+4 -(2y²+2x²-1+2xy)

x=7x²-2y²-6xy+4 - 2y²-2x²+1-2xy

x=7x²-2x²-2y²-2y²-6xy-2xy+4-1

x= 5x²-4y²-8xy+3