Question

Qual o(s) valor(es) de X em:

X^2 +2X -6=0

Answer 1

x²+2x-6=0 fórmula de baskhara x=-b±√∆/2a
a=1
b=2
c=-6
∆=b²-4ac
∆=(2)²-4*1*(-6)
∆=4+24
∆=28
x=-2±√28/2
x=-2±2√7/2
x1=-2-2√7/2
x1=-1-√7

x2=-2+2√7/2
x2=-1+√7
S={-1-√7,-1+√7}