Question

Rezolva in R ecuatia:
x la patrat= 100 supra 121

Answer 1

$\displaystyle x^2= \frac{100}{121} \\ x= \sqrt{ \frac{100}{121} } \\ x= \frac{ \sqrt{100} }{ \sqrt{121} } \\ x= \frac{10}{11} \\ x=- \frac{ \sqrt{100} }{ \sqrt{121} } \\ x=- \frac{10}{11} \\ S=\{ \frac{-10}{11} ; \frac{10}{11} \}$