Question: simplifying expression into more meaningful forms

How can I get Maple to simplify expressions into more meaningful forms?

For example, 

xc1 := -(2*Q*R1 + sqrt(4*Q^2*R1*RL - R1^2 + 2*R1*RL - RL^2))*R1/(4*Q^2*R1 + R1 - RL)


The numerator, under the radical, is more meaningful as sqrt(4 Q^2 R1 RL-(R1-RL)^2).


Similarly, the denominator can be simplified to Rs(4 Q^2+1)-RL.  


How do I get Maple to get me there?

Please Wait...