Question

a) 5x^2 -3x2=0 soma e produto

b) 3x^2 +55=0

c) x^2 -6=0

d) x^2 -10+25=0

x^2 -×-20=0

x^2 -3x-4=0

x^2 -8x+7=0

2x^2 +7x+5=0

3x^ 2+x+2=0

Answer 1

a
5x² - 3x² = 0
2x² = 0
a = 2
b = 0
c = 0
S = -b/a = 0/2 = 0 ****
P = c/a = 0/2 = 0 ***
b
3x² + 55 = 0
a = 3
b = 0
c = + 55
S = 0/3 = 0 ***
P = 55/3 ****
c
x² - 6 = 0
a=1 
b = 0
c = -1
S = 0/1 = 0 ***
P = -1/1 = -1 ***
d
x² - 10 + 25 = 0
x² + 15 = 0
a = 1
b = 0
c + 15
S = 0/1 = 0 ***
P = 15/1 = 15 ***
e
x² - x - 20 = 0
a = 1
b = -1
c = -20
S = 1/1 = 1 *** ( -b/a)
P = -20/1 = -20 *** ( -c/a)
f
x² - 3x - 4 = 0
 a = 1
b = -3
c = -4
S = 3/1 = 3***
P = -4/1 = -4 ***
g
x² - 8x + 7 = 0
a =1
b = -8
c = +7
S = 8/1 = 8 ****
P = 7/1 = 7 *****
h
2x² + 7x + 5 = 0
a = 2
b = +7
c = +5
S = -7/2 ***
P = 5/2 ***
i
3x² + x + 2 = 0
a = +3
b = +1
c = +2
S = -1/3 ****
P = 2/3 ***