Question

-4/11x^2+11=0 решите уравнение

Answer 1

$- frac{4}{11} x^{2} +11=0 \ \ frac{4}{11} x^{2} =11 \ \ 4 x^{2} =11^2 \ \ x^2= frac{121}{4} \ \ x=pm sqrt{ frac{121}{4}} \ \ x=pm5.5$