Question

1. Resolva as seguintes equações do 2e grau, sendo o conjunto U = R:
a) x2 + 7x = 0 S = {0,-7}
1) y2 + 9y + 14 = 0 S = (-2, -7}
b)-3x2 + 9x = 0 S = {0, 3}
m) b? - 3b - 10 = 0 S = {-2, 3}
c) 2x2 + 3x = 0 S = {0, 3/2}
n) 2y2 + 7y + 6 = 0 S = {-2, -3/2}
d) (y + 5)2 = 2x + 25 S = {0,- 8}
o) 4y? - 4y + 2 = 0 S = {}
d) x2 + 9x = 0 S = {0,-9 }
p) 5t? - 9t + 4 = 0 S = {1, 4/5)
9) 21m2 -26x + 8 + O S = {2/3, 4/7}
e) (y + 5)(y- 1) = 2y - 5
S = {0,- 2}
e) y? - 10 = 0 S = {
r) 4p2 - 20p + 25 = 0 S = {5/2}
s) x(x + 3) = 5x + 15 S = {-3,5}
f) 2x? + 50 = 0 S = { }
t) 2(a - 5) = a? - 13 S = (-1,3}
g) -5r+ 20 = 0 S = {-2, 2}
u) x2 + 14x + 49 = 0 S = {-7}
h) 9a? = 25 S = {-5/3, 5/3}
v) 9y- 24y + 16 = O S = {4/3}
i)(b + 6)(b - 4) = 2b + 12
S = {-6, 6}
1) 5y?- 9y - 2 = 0 S = {2, -1/3}
x) (3y + 2)(y- 1) = y(y + 2)
S = {2, -1/2)
k) x2 - 9x + 20 = 0 S = {4,5)

Answer 1

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