Question

\(\dfrac{x}{2}=\dfrac{y}{3}\)và xy=54

 

Answer 1

Đặt x/2=y/3=k

=>x=2k; y=3k

Ta có: xy=54

=>6k²=54

=>k²=9

TH1: k=3

=>x=6; y=9

TH2: k=-3

=>x=-6; y=-9