Question

Ученикам 8 класса ВОПРОС

Answer 1

$( frac{a {}^{2} - 4b {}^{2} }{4ab} ) times frac{12ab}{a + 2b} = (a - 2b)(a + 2b) times frac{3}{a + 2b} = 3a - 6b = 3(a - 2b)$

Answer 2

$( frac{a}{4b} - frac{b}{a} ) div frac{a + 2b}{12ab} = frac{ {a}^{2} - 4 {b}^{2} }{4ab} times frac{12ab}{a + 2b} = frac{(a - 2b)(a + 2b)}{4ab} times frac{12ab}{a + 2b} = 3(a - 2b)$