8x^3/2(8 sq rt(x) - 7/sq rt (x))
Easiest to put these in exponential form and then evaluate......
8x^(3/2) [ 8x^(1/2) - 7x^(-1/2) ] =
8 *8 * x^(3/2) * x^(1/2) - 8 * 7 * x^(3/2) * x^(-1/2) =
64 x^(3/2 + 1/2) - 56x^(3/2 -1/2) =
64x ^2 - 56x
