Question

[9.02] Where does the graph of y = 2x2 − x − 3 cross the x-axis?

Answer 1

that would be the x-intercepts so let y = 0 then solve for x

0 = 2x^2 - x - 3

2x ^ 2- x - 3 = 0

(2x-3)(x+1) = 0

now solve for x to get your answer

Answer 2

Thats where I'm getting confused. solving this for x.

Answer 3

hint..when you have

(x+2)(x-1) = 0

the roots will just be

x + 2 = 0 and x - 1 =0

solve for x in each case

when x + 2 = 0
x = -2

when x - 1 = 0
x = 1

does that help?

Answer 4

yes thank you

Answer 5

welcome ^_^