Question

dada a fucao f(x)=x2-x-12,suas respectivas raizes sao:

Answer 1

Delta

x¹

= 1-4(1)(-12)

= 1+48

= 49

x²

= 1+7/2

= 8/2

= 4

x³

= 1-7/2a

= -6/2

= -3

Answer 2

Vamos lá...

y = x² - x - 12

a=1 b=-1 c = -12

Δ = b²-4ac

Δ = 1 + 4*1*12

Δ=49

x' = -b+√Δ /2a

x' = 1 + 7 / 2

x' = 8/2

x' = 4

x'' = -b-√Δ /2a

x''= 1 - 7/2

x'' = -6/2

x'' = -3

S { -3, 4}