Question

ПОМОГИТЕ РЕШИТЬ УРАВНЕНИЕ ЗА 8 КЛАСС: 5^2+(0.5x)^2=x^2

Answer 1

$5^2+(0.5x)^2=x^2\ 25+0.25x^2=x^2\ 25=x^2-0.25x^2\ 25=0.75x^2\ 1=0.03x^2\ x^2=frac{1}{0.03}\ x^2=frac{100}{3}\ x_1=frac{10}{sqrt3}\x_1=frac{10sqrt3}{3}\x_2=-frac{10sqrt3}{3}$

Answer 2

5^2+(0.5x)^2=x^2

25+0,25x^2-x^2=0

-0,75x^2=-25

0,75x^2=25   /*4

3x^2=100

x=±10/√3