Question

numarul intreg y din proportia 3pe=y pe 27​

Answer 1

$\it \dfrac{3}{y}=\dfrac{y}{27} \Rightarrow y\cdot y=3\cdot27 \Rightarrow y^2=81 \Rightarrow \sqrt{y^2}=\sqrt{81} \Rightarrow |y|=9 \Rightarrow y=\pm9$

Answer 2

3/y=y/27

y²=3×27

y²=81

y=±√81

y=±9