Question

-x²-y²=6xy=20 - 3x²-4y²+5xy+20

working pls

Answer 1

Step-by-step explanation:

given =3z²-4y²+5xy+20

required=>-x²-y²+6xy+20

let the necessary cutoff expression be a .

then

3x²-4y²+5xy+20-a=-x²-y²+6

a=3x²-4y²+5xy.

=x²(3+1)+y2(-

=4x²-3y²-xy