Question

问3道因式分解题（要过程参考）x^4-5x^2+41-26x^2+25x^4a^6-7a^3-8

Answer 1

x⁴-5x²+4=(x²-1)(x²-4)=(x+1)(x-1)(x+2)(x-2)

1-26x²+25x⁴=(x²-1)(25x²-1)=(x+1)(x-1)(5x+1)(5x-1)

a^6-7a³-8=(a³+1)(a³-8)=(a+1)(a²-a+1)(a-2)(a²+2a+4)

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