Question

Виконайте дії: 1) 2) 7m 2m 5m-30 18-3m + 40 16a² 4a+b 16a² +8ab+b² 2 3) 8 6²-25 b²+56​

Answer 1

Ответ:

$1) \frac{7m}{5(m - 6)} + \frac{2m}{ - 3(m - 6)} = \frac{7m}{5(m - 6)} - \frac{2m}{3(m - 6)} = \frac{11m}{15(m - 6)} = \frac{11m}{15m - 90}$

$2) \frac{4a}{4a + b} - \frac{ {16a}^{2} }{(4a + b)^{2} } = \frac{4a \times 4a + b - 16a^{2} }{ {(4a + b)}^{2} } = \frac{16a^{2} + 4ab - {16a}^{2} }{ {(4a + b)}^{2} } = \frac{4ab}{ {(4a + b)}^{2} }$