Question

Find the roots for f(x) = 2x2 - 8 :

x = 2
x = -2
x = 2 and x = -2
x = 2 and x = -4
*work must be shown to receive credit*

Answer 1

x=2andx= -2

Explanation:

two x squared - 8 is equal to zero so you take the it across the equal to sign to get 2x squared equal to 8 you divide both sides divide both sides by two to give you two x squared is equal to 4 m taking root of Both Sides you get x equal to Plus or minus two so therefore x is equal to 2 or -2