Question

Como resolver por formula general 2x²-x-6=0

Answer 1

2х²-х-6=0; D=b²-4ac=1-4*2*(-6)=49. √D=7; x1=(1+7)/4=2; x2=(1-7)/4=-1,5. Responder: 2; -1,5.

Answer 2

Resolver.

2x² - x - 6 = 0

a = 2
b = - 1
c = - 6

x = [ - b ± √b² - 4ac]/2a

x = [ - ( - 1) ± √(- 1)² - 4(2)(-6)]/2*2
x = [ + 1 ± √1 + 48]/4
x = [1 ± √49)/4
x =[ 1± 7]/4
x1 = (1 + 7)/4
x1 = 8/4
x1 = 2
  o
x2 = (1 - 7)/4
x2 = - 6/4
x2 = - 3/2

Solucion.
( -3/2 , 2)