§ 44: 44.29

44.29 Спростіть вираз:

1) (14a- 1 – 4a+ 1a): aa-24a+1 = a-(4a -1)(4a +1)(4a -1)a • (4a -1)2a = a- a+1(4a -1)a • (4a -1)2a = (4a -1)2a • (4a -1) = 4a- 1a.

2) a+ 276a-66 • (6a-3 \6a+33a-36a+9 – 6ab-9\1a+ 27) = a+ 276a-6b • 3a- 9-6ab +9a+ 27 = a +27 • (3a - 6ab)(6a - 6b)(a +27) = 6a(6a - 6b)(6a - 6b) = 6a.