135а4b2-7a3b-4a2b-133a4b2+6a3b=2a4b2-a3b-4a2b
при а = -3, b = 2;
2•(-3)4•(2)2-(-3)3•2-4•(-3)2•2= 2•81•4+27•2-4•9•2= 648+54-72=630
1) -5,52:1,4 = -552/52 : 14/10 = -552·10/14 = - 276/70
2)-276/70·7/8 =- 69/20 = -3 9/20 = -3,45
3) 6,8 - 3,45 = 3,35
A14=-7,9+7,8*14=-7,9+109,2=101,3
3a=6i+9j-3k
-2b=-8i+2j-4k
c=6i-8i+9j+2j-3k-4k=-2i+11j-7k