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数学
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若a+b=3,ab=-2,则(4a-5b-3ab)-(3a-6b+ab)=______.
人气:295 ℃ 时间:2020-02-04 05:20:41
解答
∵a+b=3,ab=-2,
(4a-5b-3ab)-(3a-6b+ab)
=4a-5b-3ab-3a+6b-ab
=a+b-4ab
=3-4×(-2)
=11,
故答案为:11.
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