分解因式:x的三次方-5x+4
答案:4 悬赏:30 手机版
解决时间 2021-01-14 11:25
- 提问者网友:且恨且铭记
- 2021-01-14 06:02
分解因式:x的三次方-5x+4
最佳答案
- 五星知识达人网友:话散在刀尖上
- 2021-01-14 06:37
原式=(x³-1)-5x+5
=(x-1)(x²+x+1)-5(x-1)
=(x-1)(x²+x+1-5)
=(x-1)(x²+x-4)
=(x-1)(x²+x+1)-5(x-1)
=(x-1)(x²+x+1-5)
=(x-1)(x²+x-4)
全部回答
- 1楼网友:思契十里
- 2021-01-14 10:46
(x-1)(x^2+x-4)
- 2楼网友:一叶十三刺
- 2021-01-14 09:16
X^3-5X+4
=X^3-X-(4X-4)
=X(X^2-1)-4(X-1)
=X(X+1)(X-1)-4(X-1)
=(X-1)(X^2+X-4)
=X^3-X-(4X-4)
=X(X^2-1)-4(X-1)
=X(X+1)(X-1)-4(X-1)
=(X-1)(X^2+X-4)
- 3楼网友:独钓一江月
- 2021-01-14 08:06
x^3-5x+4
=x^3-1-5x+5
=(x-1)(x^2+x+1)-5(x-1)
=(x-1)(x^2+x+1-5)
=(x-1)(x^2+x-4)
=x^3-1-5x+5
=(x-1)(x^2+x+1)-5(x-1)
=(x-1)(x^2+x+1-5)
=(x-1)(x^2+x-4)
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