Question

Решите уравнения:

а) x²-$frac{2}{3}$ = 0

б) 4t-7t²=0

Answer 1

а.

$x^2-frac{2}{3}=0\\ x^2=frac{2}{3}\ \x=бsqrt{frac{2}{3}} \\ OTBET:бsqrt{frac{2}{3}}$

б.

$4t-7t^2=0\t(4 - 7t)=0\ \ t=0\ 4-7t=0\ \ t=0\ t=frac{4}{7} \ \ OTBET:0;frac{4}{7}$