Question

5у-25у2=0 решить уравнения

Answer 1

- 25y^2 + 5y = 0   /:5
- 5y^2 + y = 0  /*(-1)
5y^2 -  y = 0 
y(5y - 1) = 0

1) y = 0;
2) 5y - 1=0 ==> 5y = 1 ==> y = 1/5 = 0,2 

Answer 2

5*0,2-25*0,2*2=0 1-10=0 -9=0? как?