分解因式:-9x^(n+1)-6x^n+3x^(n-1)

问题描述:

分解因式:-9x^(n+1)-6x^n+3x^(n-1)

-9x^(n+1) - 6x^n + 3x^(n-1)
= -3x^(n - 1)·(3x² + 2x - 1)
= -3x^(n - 1)·(3x - 1)(x + 1)