楼主晚上好,“不让大脑闲置”问问团队很高兴为您答题,以下是本团队给您的答案,希望能对你有所帮助 x+4y =(x-2y)+4xy 把x-2y=8,xy=2代入,则原式=64+4×2=72 x+2y =根号(x-2y) =根号x-4xy+4y=根号72+8=根号80=4倍根号5 x+2y=4倍根号5
数学整式乘除x-2y=8,xy=2,求x^2+4y^2,x+2y
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