`x^(4)-y^(4)`

The circle x ^(2) + y^(2) +4x -4y+4=0 touches

The circle x ^(2) + y^(2) +4x -4y+4=0 touches

The equation of the tangent to the circle x^(2) + y^(2) + 4x - 4y + 4 = 0 which makes equal intercepts on the coordinates axes in given by

The numbers of terms in the expansion [(x+4y)^(4)]^(5) is .........

x^4y^4-xy

If 4y-(x-4)=4x+(-y+4) , and neither x nor y = 0, what is (x)/(y) ?

The circle x^(2)+y^(2)+4x-4y-4=0 touches