1 3.3.3 Quiz: The Qud
Question 2 of 10
Select the two values of x that are roots of this equation.
x² + 2x-6=0
A. X=-1+ 7
B. =-1+2.17
C. x=-1-227
OD. X=-1-
SUBMIT
Help

Respuesta :

Answer:

A and D

Step-by-step explanation:

x^2+2x-6=0 is a quadratic equation, the roots of this equation is given by the formula: [tex]x=(-b+-(\sqrt{b^2-4ac} ))/2a[/tex] (where z=1, b=2, c=-6), so[tex]x=(-b+-(\sqrt{b^2-4ac} ))/2a=(-2+-(\sqrt{2^2-4*1*-6} ))/2*1=-1+-\sqrt{7}[/tex]

which are answers A and D.