Expanding [(x-1)+y]^4
I hope this helps you binom formula 1 1 11 2 1 (2.th)1 3 3 1 (3.th)1 4 6 4 1 (4.th )1.x^4.y^0+4.x^3.y^1+6.x^2.y^2+4.x^1.y^3+1.x^0.y^4x^4+4.x^3.y+6.x^2.y^2+4.x.y^3+y^4
