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求多项式的零点练习
求多项式的零点 · 1–12
求出所有零点。
1.p(x) = x3 − 6x2 − 4x + 24
2.p(x) = x3 − 3x2 − 4x + 12
3.p(x) = x3 + 2x2 − 9x − 18
4.p(x) = x3 + x2 − 25x − 25
5.p(x) = x3 + 7x2 − 16x − 112
6.p(x) = x3 − 7x2 − x + 7
7.p(x) = x3 − 3x2 − 16x + 48
8.p(x) = x3 + 5x2 − 4x − 20
9.p(x) = x3 − 3x2 − 25x + 75
10.p(x) = x3 + 6x2 − 9x − 54
11.p(x) = x3 + 5x2 − x − 5
12.p(x) = x3 − 2x2 − 16x + 32
答案 — 求多项式的零点练习
求多项式的零点
3.x = 3 或 x = −2 或 x = −3
4.x = 5 或 x = −1 或 x = −5
5.x = 4 或 x = −4 或 x = −7
8.x = 2 或 x = −2 或 x = −5
10.x = 3 或 x = −3 或 x = −6
11.x = 1 或 x = −1 或 x = −5
12.x = 4 或 x = 2 或 x = −4
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