<span>(3x + 5)(2x - 7)(x - 6)= 0
3х + 5 =0 или 2х-7=0 или х-6=0
3х=-5 2х=7 х=6
х=-5/3 х=7/2
у(1)= (3*1+5)(2*1-7)(1-6)>0
x =[- бесконеч.-5/3]и [7/2; 6]
</span>
1 способ:
▪4 целых 1/6 - 2 целых 4/21 = 4 целых 7/42 - 2 целых 8/42 = (4-2)+(7/42-8/42)= 2 - 1/42 = 1 целая 42/42 - 1/42= 1 целая 41/42;
▪4 целых 3/35 - 2 целых 5/14 = 4 целых 6/70 - 2 целых 25/70 = (4-2) + (6/70 - 25/70)=2 - 19/70=1 целая 70/70 - 19/70 = 1 целая 51/70;
▪7 целых 1/16 - 3 целых 5/24=7 целых 3/48 - 3 целых 10/48 = 4+(3/48-10/48)=4 - 7/48 = 3 целых 48/48 - 7/48 = 3 целых 41/48
--------------------------------------------
2 способ:
▪4 целых 1/6 - 2 целых 4/21 = 25/6 - 46/21 = 175/42 - 92/42 = 83/42 = 1 целая 41/42;
▪4 целых 3/35 - 2 целых 5/14 = 143/35 - 33/14 = 286/70 - 165/70 = 121/70 = 1 целая 51/70;
▪7 целых 1/16 - 3 целых 5/24= 113/16 - 77/24 = 339/48 - 154/48 = 185/48 = 3 целых 41/48
0,0387:0,01-(0,3+1,003)=2,567
<u />
1) 0,3+1,003=1,303
2) 0,0387:0,01=3,87
3) 3,87-1,303= 2,567
1) 16:4=4
2)42:7*6+14=50
3)270:9*7=210
4)210-360/4+50
360/4=90
90+50=140
210-140=70
16*20=16*(2*10)=16 * 2 * 10 = 320