1 столб
10)2x^2=14
x^2=7
x=√7,-√7
11)3x^2=6
x^2=6/3
x^2=2
x=√2,-√2
12)2x^2=8
x^2=8/2
x^2=4
x=2,-2
13)3x^2=75
x^2=25
x=5,-5
14)4x^2=12
x^2=12/4
x^2=3
x=√3,-√3
15)3x^2=15
x^2=5
x=√5,-√5
16)3x^2=27
x^2=9
x=3,-3
17)2x^2=132
x^2=66
x=√66,-√66
18)11 смотри
19)9x^2=1
x^2=1/9
x=1/3,-1/3
20)-x^2=-25
x^2=25
x=5,-5
21)2x^2=72
x^2=36
x=6,-6
22)9x^2=81
x^2=9
x=3,-3
23)x^2=169
x=13,-13
24)x^2=144
x=12,-12
25)5x^2=125
x^2=5,-5
26)смотри19
27)3x^2=48
x^2=48/3
x^2=16
x=4,-4
28)9x^2=81
x^2=9
x=3,-3
29)4x^2=100
x^2=100/4
x^2=25
x=5,-5
30)5x^2=45
x^2=45/5
x^2=9
x=3,-3
31)-9x^2=-2
x^2=2/9
x=1/3,-1/3
32)9x^2=-4
x^2-4/9 нет корней