Resposta :
X²-5x+4=0 delta---> 5² - 4.1.4 = 25 - 16 = 9
Vdelta---> V9 = 3
x' = (5+3)/2 = 4
x"= (5-3)/2 = 1
Resposta: x= 4 e x = 1
Vdelta---> V9 = 3
x' = (5+3)/2 = 4
x"= (5-3)/2 = 1
Resposta: x= 4 e x = 1