Question

X²+x-12<0 ajuda pfvr

Answer 1

Resposta:

   X² - X - 12 = 0

 Δ = b² - 4.a.c

 Δ = (-1)² - 4.1.(-12)

Δ = 1 + 48

Δ = 49

 X = -b +/- √Δ /2             

X = 1 +/- √49 /2

X = 1 +/- 7 /2            

 

X¹ = 1 + 7 /2

X¹ = 8/2

X¹ = 4

X² = 1 - 7 /2

X² = - 6/2

X² = - 3