Respostas
Explicação passo-a-passo:
a
8x² - 3x - 16 = 0
a = 8
b = -3
c = - 16
S = -b/a = 3/8
P = c/a = -16/8 = -2 >>>
2
-x² - x + 30 = 0 ( - 1 )
x² + x - 30 = 0
a = 1
b = 1
c = - 30
S = -b/a = -1/-30 >>> + 1/30>>>>
P = c/a = -30/1 = -30 >>>
3
9x² - 18x = 0 por 9
x² - 2x = 0
a = 1
b = - 2
c = 0
S = -b/a = 2/1 = 2 >>>>>
P = c/a = 0/1 = zero >>>>>
incompleta
4
x² - 49 = 0
a= 1
b = 0
c= - 49
S = -b/a = -0/1 = zero
P = c/a = - 49/1 = -49 >>>
5
x² - 18x + 45 = 0
a = 1
b = -18
c = +45
S = -b/a = 18/1 = 18 >>>
P = c/a = 43/1 = 45 >>>>
6
x² + 4x + 5 = 0
a = 1
b = 4
c = 5
S = -b/a = -4/1 >>>>
P= c/a = 5/1 >>>>>
7
2x²- 32 = 0 por 2
x² - 16 = 0
a = 1
b = 0
c = -16
S = -b/a = -0/1 = zero
P = -16/1 = -16 >>>>
8
5x² + 20 = 0 por 5
x² + 4 = 0
x² = -4
Vx² = V-4
não há raizes no campo real
9
5x² + 6x + 3 = 0
a = 5
b = 6
c = 3
S = -b/a = -6/5 >>>>
P = c/a = 3/5 >>>
10
8x² -8x = 0 por 8
x² - x = 0
a = 1
b = -1
c = 0
S = -b/a = 1/1 = 1 >>>>
P = c/a = 0/1 =0 >>>