Question

resolva a seguinte inequacao quadrática x2-4x<0​

Answer 1

a = 1 b = - 4 c = 0
Δ = b² - 4.a.c
Δ = (-4)² - 4.(1).(0)
Δ = 16 - 0
Δ = 16


x = - b ± √Δ
2.a

x = - (-4) ± √16
2.1

x = + 4 ± 4
2

x'= 4 + 4 = 8 = 4
2 2

x"= 4 - 4 = 0 = 0
2 2