Can't you turn it into one of those? Factor out a 2 so it's:
Integral of 2*sqrt of [(1/4) - (x^2)]
Evaluate the Integral:
I know the rule and such, but, my professor only did examples with no coefficients on except 1, and now he's put one on the test review... So I just need help for the first substitution, I think I can get the rest from there.