Answer
+1.4 or -1.4
Work Step by Step
1.4 and -1.4 is square root of 1.96 because 1.4$\times$1.4=1.96 and (-1.4)$\times$(-1.4)=1.96.
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.