Question

Помогите пожалуйста сократить дробь!!!​

Answer 1

Объяснение:

$\frac{5d {}^{2} + d - d {}^{3} - 5}{d {}^{3} - d } = \frac{(d - 1)(d + 1)( - d + 5)}{d(d - 1)(d + 1)} = \frac{5 - d}{d}$

Answer 2

$\displaystyle\bf\\\frac{5d^{2} +d-d^{3}-5 }{d^{3} -d} =\frac{(5d^{2} -d^{3})+(d-5) }{d(d^{2} -1)}=\frac{d^{2} (5-d)-(5-d)}{d(d^{2} -1)} =\\\\\\=\frac{(5-d)(d^{2} -1)}{d(d^{2} -1)} =\frac{5-d}{d} \\\\\\\boxed{\frac{5d^{2} +d-d^{3}-5 }{d^{3} -d} =\frac{5-d}{d} }$