urgent! math

<p>can somebody please help me with this one calc problem please? people don't seem to go on the calc threads as often but i really need help with this! thanks in advance!</p>

<p>Why can't i use the general power rule to integrate the 1/ (square root of (4-x))dx....but i can use the general power rule to integrate 1/((x+1)^2)dx....</p>

<p>thanks again!</p>