Question

sem resolver as equaçoes, determine quais tem raizes reais
(4.(x²+2)=8.(x+1)

Answer 1

4x² + 8 = 8x + 8

4x² - 8x = 0 

4x ( x - 2) = 0

x' = 0 

x'' - 2 = 0

x'' = 2           S = { -2 , 0 }                 ok