Вправи: 46

46. Зведіть дріб:

1) 5a-b = 5aa-ba = 5aa2- ab;

2) 4m+n = 4(m+n)m+n(m+n) = 4m+4nm2+ 2mn+ n2;

3) 9x-y = 9(x+y)x-y(x+y) = 9x+9yx2- y2;

4) 4k-1 = 4(k2+ k+1)k-1(k2+ k+1) = 4k2+ 4k+4k3- 1;

5) aa-b = -a-(a-b) = –ab-a;

6) pp-2 = p2+p-2-p2+p = –2p+ p24- p2.