Question

Решите неравенство (4x-8)(4-x)>0

Answer 1

$frac{4x-8}{4-x} textgreater 0\\ frac{4(x-2)}{-(x-4)} textgreater 0\\ frac{x-2}{x-4} textless 0\\+++(2)---(4)+++\\xin (2,4)$