Question

resolva a equaçao: x^2/4 - x+4/10 =8

Answer 1

Olá Isabelld

x²/4 - (x + 4)/10 = 8 

mmc = 20

5x² - 2*(x + 4) = 160 

5x² - 2x - 8 = 160 

5x² - 2x - 168 = 0 

delta
d² = 4 + 4*5*168 = 3204 
d = 58 

x1 = (2 + 58)/10 = 60/10 = 6 

x2 = (2 - 58)/10 = -56/10 = -28/5 

.