Question

помогите пожалуйста!!!!

Answer 1

Пошаговое объяснение:

1)

16а² - 8 + 1 = 16а² - 16а²-1 (4а-1) (4а+1) 16а²-1 16а²-1

- 8 + 1 =

16а²-1 16а²-1

16а²-8+1 (4а-1)² (4а-1)

————– = —————— = ———

16а²-1 (4а-1) (4а+1) (4а+1)

2)

8а³+3а-1 5а-7 8а - 9

————— + ————— – ——— =

4а²+4а+1 4а²+4а+1 (2а+1)²

8а³+3а-1 5а-7 8а - 9

= ————— + ———— – ——––– =

(2а+1)² (2а-1)² (2а-1)²

= 8а³+3а-1+5а-7-8а+9 = 8а³ + 1 =

(2а-1)² (2а-1)(2а+1)

8а³+1 (2а+1) (4а² - 4а +1)

= ———— = —————————— =

(2а-1)² (2а-1)²

4а²-4а+1 (2а²-1)(2а²+1)

= ———— = ——————— = ————

(2а-1)² (2а-1)² (2а-1)

= 2а+1.