Question

Решите уравнение:
1) х² - 4[x] = 0
2) 2х² - 5[x] = 0
3) 5х² - 7[x] = 0
4) 9x² + 3[x] = 0

Answer 1

1 [x]([x]-4)=0;x=4;-4;0

2 [x](2[x]-5)=0;x=0;2.5;-2.5;

3 [x](5[x]-7)=0;x=0;x=1.4;x=-1.4

4 [x](9[x]+3)=0;x=0;