" 5."x^(2)+y-xy-x

Subtract the sum of 7x^(2) - 4y^(2) " and " 4x^(2) + 3xy - 4y^(2) from the sum of 5x^(2) - 3xy - y^(2) "and " x^(2) + 2xy - 2y^(2) .

Evaluate : 3x^(2) + 5xy - 4y^(2) + x^(2) - 8xy - 5y^(2)

If 5x^(2) -4xy +y^(2) -2x +1=0 then value of x+y is

Add : 5x ^(2) - 3xy + 4y ^(2) - 9, 7y ^(2)+ 5xy - 2x ^(2) + 13

If x:y::5:2, then (x ^(2) - xy + y ^(2))/( x ^(2) + xy + y ^(2)) = ?

If 5x^(2) + 4xy + y^(2) + 2x + 1= 0 then find the value of x, y

If 5x^2-4xy+y^2-2x+1=0 then x+y=

If x ^(2) + 5xy + y^(2) =-2x + y -6=0 then y'' at (1,1) is

The area of the square formed by thelines 6x^(2)-5xy-6y^(2)=0 and 6x^(2)-5xy-6y^(2)+x+5y-1=0 in sq.units is