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

What should be added to x^2+xy+y^2 to obtain 2x^2+3xy ?

What must be added to 2x^(2)-3xy+5y^(2) to get x^(2)-xy-y^(2) ?

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

Add the following expressions using horizontal method : -x^(2)y + xy^(2) + 2xy , 3x^(2) y + 4xy^(2) + 5xy and 7x^(2)y - 10xy^(2) - xy

Find (x)/(y) , when x^(2) + 6y^(2) = 5xy .

Factorise x^(2) - 2y +xy -4

Subtract : 7xy + 5x^(2) - 7y^(2) + 3 " from " 7x^(2) - 8xy + 3y^(2) - 5

How much is -x^(2)+7y^(2)-3xy less than 2x^(2)-y^(2)+xy ?

The product of (2x^(2) - y ) and xy is