Answer
1
Work Step by Step
Base on the identity rule of fraction , $\frac{4}{9}$x$\frac{9}{4}$=1 , and negative times negative should be positive , so -$\frac{4}{9}$ x-$\frac{9}{4}$=1
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.