Question

срочно, решите пример

Answer 1

$frac{4ab}{a - b} times frac{ {a}^{2} - ab }{8b} = \ frac{4a {}^{3}b - 4a {}^{2} b {}^{2} }{8ab - 8b {}^{2} } = \ frac{4 {a}^{2} b(a - b)}{8b(a - b)} = \ frac{ {a}^{2} }{2} = frac{19 {}^{2} }{2} = frac{361}{2} = 180.5$