Question

Сократить дробь

1. 6x^3y^2/15xy^3

2. x^2-9/3x-9

3. 2b+18/b^2+18b+81

Answer 1

Объяснение:

$1) \: \: \: \: \frac{ {6x}^{3} {y}^{2} }{ {15xy}^{3} } = \: \frac{2 {x}^{3} {y}^{2} }{5 {xy}^{3} } = \: \frac{2 {x}^{2} }{5y}$

$2) \: \: \: \: \frac{ {x}^{2} - 9 }{3x - 9} = \: \frac{(x - 3)(x + 3)}{3(x - 3)} = \frac{x + 3}{3}$

$3) \: \: \: \frac{2b + 18}{ {b}^{2} + 18b + 81 } = \frac{2(b + 9) }{ {(b + 9)}^{2} } = \frac{2}{b + 9}$