来自李盛瑜的问题
已知2x-3xy-2y=0(x>0),则x2+4xy−16y22x2+xy−9y2的值是()A.23B.49C.1625D.1627
已知2x-3
xy-2y=0(x>0),则x2+4xy−16y22x2+xy−9y2的值是()
A.23
B.49
C.1625
D.1627
1回答
2020-02-01 00:13
已知2x-3xy-2y=0(x>0),则x2+4xy−16y22x2+xy−9y2的值是()A.23B.49C.1625D.1627
已知2x-3
xy-2y=0(x>0),则x2+4xy−16y22x2+xy−9y2的值是()
A.23
B.49
C.1625
D.1627
原方程得2(xy