Question

whats the value ofthis number ​

Answer 1

Step-by-step explanation:

$= \frac{ \frac{5}{ {a}^{2} - {b}^{2} } }{ \frac{15}{a - b} } \\ > > {x}^{2} - {y}^{2} = (x + y)(x - y) < < \\ = \frac{5}{(a + b)(a - b)} \times \frac{(a - b)}{15} \\ = \frac{1}{3(a + b)}$