Answer
$\pm .0123 nm$
Work Step by Step
We solve to find:
$x - x_0 = \pm \sqrt{\frac{E-U_0}{a}}= \pm \sqrt{\frac{-.717-(-.760)}{286}}=\pm .0123 \ nm$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.