Odpowiedzi

2010-02-28T14:58:16+01:00
5a(-2b + 1 ) + 3b(9a - 2) - (a - 2b) =
-10ab+5a+27ab-6b-a+2b =
17ab+4a-4b



2,5x(4y-z) - 4,5y(2x - z) + 3,5z(5y-2x) =
10xy-2,5xz-9xy+4,5yz+17,5yz-7xz =
xy-9,5xz+22yz
2010-02-28T15:05:36+01:00
1) 5a(-2b+1)+3b(9a-2)-(a-2b)=-10ab+5a+27ab-6b-a+2b=17ab+4a-4b

2) 2,5x(4y-z) - 4,5y(2x - z) + 3,5z(5y-2x) = 10xy-2,5xz-9xy+4,5zy+17,5zy-7xz= xy - 9,5xz + 22zy