Odpowiedzi

Najlepsza Odpowiedź!
2010-02-22T22:22:47+01:00
1.
-(k-m-n)+2(k+2m+3n)-kmn =
-k+m+n+2k+4m+6n-kmn =
k+5m+7n-kmn

2.
2p(3p-2r)+3r(p-2r) =
6p²-4pr+3pr-6r² =
6p²-pr-6r²

3.
(a+2ab+b)-(a-2ab)+b =
a+2ab+b-a+2ab+b =
4ab+2b

4.
(ay-3a*5y-5⅔ )-(4ay-3⅔) =
ay-15ay-5⅔ -4ay+3⅔ =
-18ay-2

5.
(a+2s)- ½(a-2s) =
a+2s-½a+s =
½a+3s