Question

решите уравнение 1/9 х^ 2 = 0.81

Answer 1

1/9 х^ 2 = 0.81 | *9

 х^ 2 = 0.81 * 9

 х^ 2 =7.29

 х=2.7

 

Answer 2

x^2/9=0.81

0.81*9=x^2

x=2.7

x=-2.7

Ответ:x=2.7;-2.7