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2024-11-28 12:05:34
推荐回答(1个)
回答1:

x^2+5x-6
=(x-1)(x+6)
=(√5-2)(√5+5)
=(√5-2)(√5+2+3)
=(√5-2)(√5+2)+3(√5-2)
=1+3√5-6
=3√5-5