Question

x mũ 2/9 =y mũ 2 / 16 và x mũ 2 + y mũ 2 =100

Answer 1

\(\dfrac{x^2}{9}=\dfrac{y^2}{16}=\dfrac{x^2+y^2}{9+16}=\dfrac{100}{25}=4\\ =>\left\{{}\begin{matrix}x^2=9.4=36\\y^2=4.16=64\end{matrix}\right.\\ =>\left\{{}\begin{matrix}x=\pm6\\y=\pm8\end{matrix}\right.\)

Answer 2

x2​=16y2​=9+16x2+y2​=25100​=4=>{x2=9.4=36y2=4.16=64​=>{x=±6y=±8​