If the above is your question
Cancel 0.5 of numerator and denominator and your question becomes
Squaring both sides
I think you can go ahead and solve this and next question
Then you need to know that:
- ; and
Do the same with the denominator:
and now invert and multiply, and the second equation reads
Substitute into the first equation and solve for , and then .
Do the second problem in a similar way.