X^4-10X^2+9怎么做啊(1)X^4-10X^2+9(2)(X^2-2X-3)(X^2+2X-24)+90备注:X^2为X的平方

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X^4-10X^2+9怎么做啊(1)X^4-10X^2+9(2)(X^2-2X-3)(X^2+2X-24)+90备注:X^2为X的平方
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X^4-10X^2+9怎么做啊(1)X^4-10X^2+9(2)(X^2-2X-3)(X^2+2X-24)+90备注:X^2为X的平方
X^4-10X^2+9怎么做啊
(1)X^4-10X^2+9
(2)(X^2-2X-3)(X^2+2X-24)+90
备注:X^2为X的平方

X^4-10X^2+9怎么做啊(1)X^4-10X^2+9(2)(X^2-2X-3)(X^2+2X-24)+90备注:X^2为X的平方
1.X^4-10X^2+9
=(x^2 -9)(x^2 -1)
=(x-3)(x+3)(x-1)(x+1)
2.(X^2-2X-3)(X^2+2X-24)+90
令X^2-2X=a
则 原式=(a-3)(a-24)+90
=a^2 -27a+162
=(a-9)(a-18)
=(x^2 -2x-9)(x^2 -2x-18)

1.(X^2-9)(X^2-1)

X^4-10X^2+9=(X^2-1)(X^2-9)

1.
X^4-10X^2+9
=(x^2 -1)(x^2 -9)
=(x+1)(x-1)(x+3)(x-3)
2.
题目录错了吧