Question

Решите пожалуйста срочно!!! ​

Answer 1

Ответ:

$- \frac{54 {a}^{6} {b}^{9} }{ {c}^{12} } \times ( - \frac{ {c}^{20} }{12 {a}^{4} {b}^{15} } ) = \frac{9 {a}^{2} {c}^{8} }{2 {b}^{6} }$

$\frac{98 {m}^{8} }{ {p}^{17} } \div (49 {m}^{5} {p}^{2} ) = \frac{98 {m}^{8} }{ {p}^{17} } \times \frac{1}{49 {m}^{5} {p}^{2} } = \frac{2 {m}^{3} }{ {p}^{19} }$

$\frac{5a + 5b}{b} \times \frac{6 {b}^{2} }{ {a}^{2} - {b}^{2} } = \frac{5(a + b)}{b} \times \frac{6 {b}^{2} }{(a - b)(a + b)} = \frac{30b}{(a - b)}$

$\frac{ {x}^{2} - 49}{3x - 24} \div \frac{5x + 35}{x - 8} = \frac{(x - 7)(x + 7)}{3(x - 8)} \times \frac{x - 8}{5(x + 7)} = \frac{x - 7}{15}$

$\frac{3a}{a - 3} + \frac{a + 5}{6 - 2a} \times \frac{54}{5a + {a}^{2} } = \frac{3a}{a - 3} + \frac{a + 5}{2(3 - a)} \times \frac{54}{a(5 + a)} = \frac{3a}{a - 3} + \frac{27}{a(3 - a)} = \frac{3a}{a - 3} - \frac{27}{a(a - 3)} = \frac{3 {a}^{2} - 27}{a(a - 3)} = \frac{3(a - 3)(a + 3)}{a(a - 3)} = \frac{3(a + 3)}{a}$