Question

o conjunto soluçao da equaçao a seguir x²+10 x+16=0 é

a-S={2,8}
b-S={-8,-2}
c-S={-5,5}
d-S={-16,-4}

Com calculos

Answer 1

x² +10x +16 = 0

Δ = b² - 4.a.c
Δ = 10² -4.1.16
Δ = 100 - 64
Δ = 36

x = -b +- √Δ / 2a
x = -10 +- 6 / 2

x1 = -10 +6/2               x2 = -10 -6/2
x1 = -4/2                      x2 = -16/2
x1 = -2                         x2 = -8

S = {-2, -8} resp. b