anonymous
  • anonymous
a Proton in a magnetic field follows a path on a coordinate grid modeled by the function f(x)=x^4-2x^2-15. What are the x-coordinates of the points on the grid where the proton crosses the x-axis?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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dape
  • dape
Have you started working on the problem, do you know what equation you need to solve?
anonymous
  • anonymous
no, i am completely lost. :/ sorry
dape
  • dape
If you draw a pair of coordinate axes, you can see what value the function must be when it crosses the x-axis.

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anonymous
  • anonymous
ok. thanks!
dape
  • dape
|dw:1378421284583:dw|
dape
  • dape
From this figure you see that whenever f(x) crosses the x-axis it has the value 0.
dape
  • dape
So the equation you need to solve to find for which x's the function crosses the x-axis is simply: \[f(x)=0=x^4-2x^2-15\]
dape
  • dape
Do you think you know how to solve that equation?
anonymous
  • anonymous
Kind of...
anonymous
  • anonymous
i can solve it now
dape
  • dape
Great, let me know if you want me to check your answer when you got it.
anonymous
  • anonymous
i'll be fine! thanks!
dape
  • dape
Yeah, that's what I thought ;)
anonymous
  • anonymous
haha thank you!

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