1) 3 1/7 - 4 7/10 = 22/7 - 47/10 = 220/70 - 329/70 = - 109/70
2) - 109/70 : 1/90 = - 109/70 * 90/1 = - 9810/70 = - 140целых 10/70 = - 140целых 1/7
1) D=64+84=148 (4)
2) [-1+-sqrt(1+24)]/4=[-1+-5]/4
x1=1 x2=-1.5 (4)
3) q=4*(-3)=-12
-p=-3+4=1
p=-1
ответ (2)
2х-1/3-3=4х
2х-4х=1/3+3
-2х=3,3
х=3,3/-2
х=-1,6