Question

分解因式：X的（m+3）次方-X的m+1次方是啥?

Answer 1

x^m+3=x^m+1乘x^2

依据x^a+b=x^a乘x^b

所以原式=x^m+1(x^2-1)

=x^m+1(x-1)(x+1)