Question

Determine as raízes da função y=x^2-5x+3

Answer 1

X^2 - 5X + 3 = 0

a=1...b=- 5...c=3

FORMULA DELTA

D = b^2 - 4 a c

D = (- 5)^2 - 4 (1) (3)

D = 25 - 4 (3)

D = 25 - 12

D = 13

FORMULA DE BRASKARA

X = - b + , - \/ D
......__________
................2 a

X = - (-5) + , - \/ 13
......____________
...................2 (1)

X' = 5 + 3,60
........________
...............2

X' = 8,60
......_____
..........2

X' = 4,30


X" = 5 - 3,60
......._______
.............2

X" = 2,60
......._____
............2

X" = 1,30


S = { 4,30 ; 1,30 }