Відповіді до вправ § 1 - § 12: 3.5

3.5 Спростіть вираз:

1) 5x2a + 3x2a = 8x2a = 4xa;

2) a+b12 – a-5b12 = a+b-(a-5b)12 = a+b-a+5b12 = 6b12 = b2;

3) b-35 + 13-b5 = b-3+13-b5 = 105 = 2;

4) a+2b8 + 3a+6b8 = a+2b+3a+6b8 = 4a+8b8 = 4(a+2b)8 = a+2b2;

5) 6m-310m – m-1310m = 6m-3-(m-13)10m = 6m-3-m+1310m = 5m+1010m = 5(m+2)10m = m+22m;

6) 5x-34x + 11-x4x = 5x-3+11-x4x = 4x+84x = 4(x+2)4x = x+2x.