Question

f(x) = 14x^2. Where does it intersect the x axis?

Answer 1

when x equals zero.

Answer 2

how do you know?

Answer 3

http://www.wolframalpha.com/input/?i=y+%3D+14x^2

Answer 4

it crosses the x axis when f(x) equals zero. you can find it by setting f(x) to zero and determining what x must be to make f(x) equal 0.

Answer 5

It will intersect the x-axis when y=0. Solve 0=14x^2 for x; that is your answer.

Answer 6

oh I picked a bad one to try out for my purposes... thankyou for the explanation

Answer 7

you can use the quadratic formula. or just set y equal to 0 and solve for x.

Answer 8

that wolfram is super cool!