Question

y=-x*elevadoa2*-12x-20

Answer 1

-x^2-12x-20=0
delta=b^2-4ac
delta=(-12)^2-4.(-1).(-20)
delta=144-80
delta=64
x=-b-/+ raiz de delta/2a
x=-(-12)-8/2.(-1)
x=12-8/-2
x=4/-2
x=-2
x=-(-12)+8/2.(-1)
x=12+8/-2
x=20/-2
x=-10
S={-2, -10}

Answer 2

Ola Leticia

-x² - 12x -20 = 0 (*-1)

x² + 12x + 20 = 0

a = 1
b = 12
c = 20

delta
d² = b² - 4ac
d² = 12² - 4*20
d² = 144 - 80 = 64

d = 8

x1 = (-b + d)/2
x1 = (-12 + 8)/2 = -4/2 = -2

x2 = (-b - d)/2
x2 = (-12 - 8)/2 = -20(2 = -10 

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