ClaudioOliveraAluna 24/10/2013 -4x²+28x=0a= -4 b= +28 c= 0delta = (b)²-4.a.cdelta = (28)²-4.-4.0delta = 784 - 0delta = 784x' = -( b) + / 2.ax' = - (28) + / 2.-4x'= -28 + 28 / 2.-4x' = 0x" = -( b) - / 2.ax" = - (28) - / 2.-4x" = -28 - 28 / 2.-4x" = -56 / -8x" + 7V: { 0,7 }
ClaudioOliveraAluna
-4x²+28x=0
a= -4 b= +28 c= 0
delta = (b)²-4.a.c
delta = (28)²-4.-4.0
delta = 784 - 0
delta = 784
x' = -( b) + / 2.a
x' = - (28) + / 2.-4
x'= -28 + 28 / 2.-4
x' = 0
x" = -( b) - / 2.a
x" = - (28) - / 2.-4
x" = -28 - 28 / 2.-4
x" = -56 / -8
x" + 7
V: { 0,7 }