Question

Expanding [(x-1)+y]^4

Answer 1

I hope this helps you








binom formula


1

1 1



1 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^4



x^4+4.x^3.y+6.x^2.y^2+4.x.y^3+y^4