<span>6x-2x²-5 = 4x²+x-9
6х²-5х-4=0
D=25+196=121=(⁺₋11)²
х₁=(5+11)/12=4/3=1 1/3
х₂=(5-11)/12=-1/2</span>
M=2E/v^2
E=2,5*10^6=2500000Дж
v=<span>60•1000/3600=</span>16,66м/с
m=2*2500000/16,66^2=5000000/277,5556=18014,40864кг=18,014т
9)
1Д 2В 3Г 4Б
10)1/16=0,0625
11)6