Question

y= x(elevado a 2) + x -12

Answer 1

x²+x-12

a=1
b=1
c=-12

∆=b²-4.a.c
∆=1²-4.1.(-12)
∆=1+48
∆=-49

x=-b+-✓/2.a
x=-1+-✓49/2.1
x=-1+-7/2

x1=-1+7/2
x1=6/2
x1=3

x2=-1-7/2
x2=-8/2
x2=-4

Answer 2

Resolução:

x² + x - 12 = 0

a = 1

b = 1

c = - 12

Δ = b² - 4.a.c  

Δ = 1² - 4 . 1 . (- 12)  

Δ = 1 + 48

Δ = 49

x = (- b +- √Δ)/2a

x = (- 1 +- √49)/2 . 1

x = (- 1 +- 7)/2

x' = (- 1 + 7)/2

x' = 6/2

x' = 3

x'' = (- 1 - 7)/2

x'' = - 8/2

x'' = - 4