计算(x+1)(x-2)(x-3)(x-6)
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计算(x+1)(x-2)(x-3)(x-6)
计算(x+1)(x-2)(x-3)(x-6)
计算(x+1)(x-2)(x-3)(x-6)
(x+1)(x-2)(x-3)(x-6)
=(x+1)(x-6)(x-2)(x-3)
=(x^2-5x-6)(x^2-5x+6)
=(x^2-5x)^2-36
=x^4-10x^3+25x^2-36
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