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Mathematics
OpenStudy (anonymous):

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

OpenStudy (anonymous):

when x equals zero.

OpenStudy (anonymous):

how do you know?

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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.

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

that wolfram is super cool!

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