[" Q What should we taken away from "],[3x^(2)-4y^(2)+5xy+20" to obtain "-x^(2)-y^(2)],[+6xy+20?]

What should be taken away from 3x^(2)-4y^(2)+5xy+20 to obtain -x^(2)-y^(2)+6xy+20?

What should be taken away from 3x^2-4y^2+5xy+20 to obtain -x^2-y^2+6xy+20 ?

What should be taken away from 3x^2-4y^2+5xy+20 to obtain -x^2-y^2+6xy+20 ?

What should be taken away from 3x^2 – 4y^2 + 5xy + 20 to obtain – x^2 – y^2 + 6xy + 20 ?

What should be taken away from 3x^2-4y^2+5xy+20 to get x^2-y^2+6xy+20

An expression is taken away from 3x^(2)-4y^(2)+5xy+20 to obtain -x^(2)-y^(2)+6xy+20, then the expression is.

3x^(2)-20xy-7y^(2)

What should be added to x^(2) - y^(2) +2xy to obtain x^(2) + y^(2) + 5xy ?