Question

4x = 16
X = 16/4
X = 14 = x = 2 e-2​

Answer 1

(4x-16).(4-2x) < 0

16x - 8x² - 64 + 32x < 0

-8x²+48x - 64 < 0 (dividindo tudo por -8)

x² - 6x +8 > 0

x = ( 6 +-√36 - 32)/2

x = (6 +-2)/2

x' = 8/2 = 4

x" = 4/2 = 2