Вправи: 4.22

4.22 Виконайте дію:

1) a-22(a+1) + aa+1 = a-2+2a2(a+1) = 3a-22a+2;

2) m4(a+b) – 3m5(a+b) = 5m-12m20(a+b) = -7m20(a+b) = –7m20a+20b;

3) a-22a+6 – a+13a+9 = a-22(a+3) – a+13(a+3) = 3a-2-2(a+1)6(a+3) = 3a-6-2a-26(a+3) = a-86a+18;

4) 4ax-ay + 5bx-by = 4ax-y + 5b(x-y) = 4b+5aab(x-y);

5) 5x – 30x(x+6) = 5x+6- 30x(x+6) = 5x+30-30x(x+6) = 5xx(x+6) = 5x+6;

6) 6x2+ 3x – 2x = 6x(x+3) – 2x = 6-2(x+3)x(x+3) = 6-2x-6x(x+3) = -2xx(x+3) = –2x+3.