(X+1)的三次方:
X的三次方正档+3X的平方+3X+1
(X-1)的三次方:
X的三次方春清基-3X的平扒谨方+3X-1
(x+1)^3=x^3+3x^2+3x+1
(x-1)^3=x^3-3x^2+3x-1
(a+b)^3=a^3+3a^2b+3ab^2+b^3
需要更脊顷高次的展宽宴开式慎野银可以hi我
(x+1)^3=(x+1)*(x+1)^2=(x+1)*(x^2+2x+1)=x^3+3x^2+3x+1;
(x-1)^3=(-1)*(x-1)^2=(x-1)(x^2-2x+1)=x^3-3x^2+3x-1.
(x+1)三次方 =(x+1)(x+1)²
=(x+1)(x²+2x+1)
=x三次枝掘方+2x²+ x+x²+2x+1
=x三次册搭扮方+3x²+ 3x+1
想减也如州灶此