Question

7. Спростіть вираз (3b+1 - 3b-1):6b2
3b-1. 3b+1. 9b2-1​

Answer 1

Ответ:

$\frac{(3b - 1 {)}^{2} - (3b - 1)}{(3b - 1) \times (3b + 1} \times \frac{9 {b}^{2} - 1}{6 {b}^{2} } = \frac{2 \times 6b}{(3b - 1) \times (3b + 1)} \times \frac{(3b - 1) \times (3b + 1)}{6 {b}^{2} } = 12b \times \frac{1}{6 {b}^{2} } = 2 \times \frac{1}{b} = \frac{2}{b}$