√18 = √9 ·√2 = 3√2
√8 = √4 ·√2 = 2√2
√32 = √16 ·√2 = 4√2
3√2 + 2√2 + 4√2 = 9√2 = 9· 1,414 = 12, 726 ≈ 12,7
Ответ: 12,7
7(-3+2х)=-6х-1
-21+14х=-6х-1
14х+6х=-1+21
20х=20
х=1
(35/8 - 11/5) : 3/40 = (175/40 - 88/40) : 3/40 = 87/40 : 3/40 = 87/40 * 40/3 = 29
V1= 40000(кг)/7700(кг/м3)=5.2(м3)
m2=v2*p(стали)=1.3(м3)*7700(кг/м3)=10000 кг
$$- \frac{3 b}{b^{2} - b - 2}$$