ПОМОГИТЕ РЕШИТЬ 20 БАЛЛОВ ДАЮ, №134 (1-4)

1)
$10 {x}^{2} - 14x = 2 {x}^{2} - 5 \\ 10 {x}^{2} - 2 {x}^{2} - 14x + 5 = 0 \\ 8 {x}^{2} - 14x + 5 = 0$
D=196-160=36
x1=(14+6)/16=5/4
x2=(14-6)/16=1/2

2)
${x}^{2} + 8x + 16 = 4 {x}^{2} + 5 \\ 3 {x}^{2} - 8x - 11 = 0$
D=64+132=196
x1=(8+14)/3=22/3
x2=(8-14)/3=-2

3)
${x}^{2} - 10x + 25 = 3 {x}^{2} - x + 14 \\ 2 {x}^{2} + 9x - 11 = 0$
D=81+88=169
x1=(-9+13)/4=1
x2=(-9-13)/4=-22/4=-11/2

4)
$36 {x}^{2} - 9x - 3x + 1 = 0 \\ 36 {x}^{2} - 12x + 1 = 0$
D=144-144=0
x=12/(36×2)=6/36=1/6