帮忙算一下行吗?谢谢 (1)x^4-10x^2+9 (2)x^4-6x^2-27

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帮忙算一下行吗?谢谢 (1)x^4-10x^2+9 (2)x^4-6x^2-27
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帮忙算一下行吗?谢谢 (1)x^4-10x^2+9 (2)x^4-6x^2-27
帮忙算一下行吗?谢谢 (1)x^4-10x^2+9 (2)x^4-6x^2-27

帮忙算一下行吗?谢谢 (1)x^4-10x^2+9 (2)x^4-6x^2-27
(1)x^4-10x^2+9
=(x²-9)(x²-1)
=(x+3)(x-3)(x+1)(x-1)
(2)x^4-6x^2-27
=(x²-9)(x²+3)
==(x+3)(x-3)(x²+3)

这。。都是等于0么