Question

$\frac{a+1}{a^{2} } -\frac{a+2}{a^{2}+a }$ срочно! Полное решение

Answer 1

Ответ:

$\frac{a + 1}{a {}^{2} } - \frac{a + 2}{a {}^{2} + a } = \frac{a + 1}{a {}^{2} } - \frac{a + 2}{a \times (a +1)} = \frac{(a + 1) {}^{2} - a \times (a + 2) }{a {}^{2} \times (a + 1) } = \frac{a {}^{2} + 2a + 1 - a {}^{2} - 2a}{a {}^{3} + a {}^{2} } = \frac{1}{a {}^{3} + a {}^{2} }$