Question

ПОМОГИТЕ СРОЧНО! ДАЮ 10 БАЛОВ!!!!!!​

Answer 1

Ответ:

$\frac{ {a}^{2} }{(a - 1)(a + 1)} - \frac{a}{a + 1} = \frac{ {a}^{2} \: - a(a - 1) }{(a - 1)(a + 1)} = \frac{ {a}^{2} - {a}^{2} + a}{ {a}^{2} - 1} = \frac{a}{ {a}^{2} - 1} = \frac{ {1.5}^{2} }{ {1.5}^{2} - 1} = \frac{ {1.5}^{2} }{0.5 \times 2.5} = \frac{1.5 \times 1.5}{0.5 \times 2.5} = \frac{15 \times 15}{5 \times 25} = \frac{45}{25} = \frac{9}{5} = 1 \frac{4}{5}$