<span>1)
2х²-5=0,
2х</span>² = 5,
<span>х</span>² = 2,5,
<span>х1 = </span>√2,5,
х2 = -√2,5,
<span>
2)
-х²+3=0,
х</span>² = 3,
<span>х1 = </span>√3,
<span>х2 = -</span>√3,
<span>
3)
-3(х+3)²+48=0,
-3(х+3)</span>² = -48,
<span>(х+3)</span>² = 16,
<span>х+3 = 16,
х = 16-3,
х1 = 13,
х+3 = -16,
х = -16-3,
х2 = -19,
4)
(х-4)</span>²<span>=1/4,
х-4 = </span>√1/4,
<span>х-4 = 1/2,
х1 = 4 1/2,
х-4 = -</span>√1/4,
<span>х-4 = -1/2,
х2 = 3 1/2,
5)
(х+1)²-4=0,
(х+1)</span>²<span> = 4,
х+1 = </span>√4,
х+1 = 2,
х1 = 1,
х+1 = -2,
х2 = -3
37х=170
х=4 22/37
ответ целым числом не выходит
5\6+2*(0.63:0.6-1.6)
1. 0,63/06 = 1,05
2. 1,05-1,6 = -0,55
3. 2*(-0,55) = -1,1
4. 5/6 = 0,83
5. 0,83+(-1,1) = -0,26(6) = -0,27
=0,8+0,2:(0,46-1,8+0,45)=0,8+0,2:(-0,89)=0,8-0,22=0,58
28:5=5,6 96:44=8(ост2) 39:12=3(ост3) 78:24=6(ост3)