若a、b为有理数,且a、b满足a+2b+根号2b=17-4根号2,求a+b的值
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若a、b为有理数,且a、b满足a+2b+(根号2)b=17-4(根号2),求a+b的值
人气：433 ℃ 时间：2019-10-19 14:40:50
解答
∵a+2b+(根号2)b=17-4(根号2),
∴a+2b=17,b=-4
∴b=-4,a=25
∴a+b=21
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