请将下列多项式因式分解: 3x²+21x+36=? (x²-2x)²-11(x²-2x)+24=?

问题描述:

请将下列多项式因式分解: 3x²+21x+36=? (x²-2x)²-11(x²-2x)+24=?
求解答求解答,,,

3x²+21x+36
=3(x²+7x+12)
=3(x+3)(x+4)
(x²-2x)²-11(x²-2x)+24
=(x²-2x-3)(x²-2x-8)
=(x-3)(x+1)(x-4)(x+2)