Question

Use a table of values to graph each equation. State domain and range
2x^2+4x-6

Answer 1

See the youtube video.

http://www.youtube.com/watch?v=c74m88mbi9k

The domain is \[(-\infty,+\infty)\] The range is \[[-12,+\infty)\]

Answer 2

2x^2 +4x -6=0 /2
x^2 +2x -3=0
(x+3)(x-1)=0
x+3=0
x=-3

x-1=0
x=1