Question

Tim 2 so x va y biet

x/2=y/5 va xy=10

Answer 1

x/2 = y/5

=> xy/10 = x/2 = y/5 = 10/10 = 1

=> x = 1x 2 = 2

     y = 1 x 5 = 5

Answer 2

Đặt \(k=\frac{x}{2}=\frac{y}{5}\)

=> \(k^2=\frac{xy}{2.5}=\frac{xy}{10}=\frac{10}{100}=1\)

=> k = -1;1

+ k = -1 thì \(\frac{x}{2}=-1\Rightarrow x=-2\)

                 \(\frac{y}{5}=-1\Rightarrow y=-5\)

+ k = 1 thi \(\frac{x}{2}=1\Rightarrow x=2\)

                 \(\frac{y}{5}=1\Rightarrow y=5\) 

Vậy .............................