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分解因式:(1)x3+x2-4x-4(2)25xn-10xn+1+xn+2.

题目详情
分解因式:
(1)x3+x2-4x-4
(2)25xn-10xn+1+xn+2
▼优质解答
答案和解析
(1)x3+x2-4x-4
=x3-4x+x2-4
=x(x2-4)+(x2-4)
=(x2-4)(x+1)
=(x+2)(x-2)(x+1);

(2)25xn-10xn+1+xn+2
=xn(x2-10x+25)
=xn(x-5)2