Question

9y^2-6,25=0 решите уравнение

Answer 1

$9y^2-6,25=0\(3y)^2-2,5^2=0\(3y-2,5)(3y+2,5)=0\y=бfrac{2,5}{3}=бfrac{25}{30}=бfrac{5}{6}$