Вправи: 219

219. Виконайте ділення:

1) 9a22 : 18 = 9a22 • 118 = 9a22 •18 = a24;

2) 14b3 : 28b² = 14b3 : 28b21 = 14b3 • 128b2 = 14b3•28b2 = 16b;

3) 36x25 : (–24x³) = 36x25 : (–24x31) = 36x25 • (–124x3) = –36x25 •24x3 = –310x;

4) (a + 2) : 4+2a3 = a+21 • 34+2a = a+2•34+2a = a+2•32(2+a) = a+2•32 •(a+2) = 32 = 1,5;

5) (3b – 12) : 4-b3 = 3b-121 • 34-b = 3b-12•34-b = 3b-4•34-b = –9(b-4)b-4 = –9;

6) (a – 4a²) : 4a-1a = a-4a21 • a4a-1 = (a-4a2) •a4a-1 = a1-4a•a4a-1 = –a2(4a-1)4a-1 = –a².