Question

Sendo U = R, resolva a seguinte equação biquadrada:
-100x2 + 4x4 = 0

A - +25, -25
B - +5, -5,0
C - +10, -10,0
D - +20, -20
E-0.+2. -2​

Answer 1

4x⁴ - 100x² = 0 ===> :(4)

x⁴ - 25x² = 0

(x² + 5x).(x² - 5x)= 0

x(x+5). x(x-5) = 0

x'=0

x"= -5

x'"= 5 ===> B - +5, -5,0