Question

calcular o discriminante de cada equacao e analizar as raizes em cada caso 9×2-24×+16 (R:4/3)

Answer 1

9X^2 - 24X + 16
a=9....b= - 24.....c=16

FORMULA DELTA
D = b^2 - 4 a c
D = (-24)^2 - 4 *8) (16)
D = 576 - 36 (16)
D = 576 - 576
D = 0

FORMULA DE BRASKARA
X= - b +,- \/D
.....________
.............2a

X = - (-24) +,- \/0
......___________
................2(9)

X = 24 +,- 0
......_______
..............18

X' = 24 + 0
.......______
.............18

X' = 24
.......___....(÷2)
.........18

X' = 12
.......___...(÷3)
.........9

X' = 4
.......__
........3

X" = 24 - 0
.......______
.............18

X" = 24
.......___...(÷2)
.........18

X" = 12
.......___....(÷3)
..........9

X" = 4
.......__
........3

S ={ 4/3 }