Вправи: 436

436. Подайте у вигляді дробу:

1) 2x – 1x = 2x2- 1x;

2) 4p – 4p2- 1p = 4p2- 4p2+ 1p = 1p;

3) 2m + 3m-1 = 2m-2+3mm(m-1) = 5m-2m(m-1);

4) m1-m + 1+mm = m2+ 1- m2m(1-m) = 1m(1-m);

5) c3c-1 + c3c+1 = 3c2+ c+3c2- c3c-1(3c+1) = 6c29c2- 1;

6) xx-y – xx+y = x2+ xy- x2+ xyx-y(x+y) = 2xyx2- y2.