x^3/2(sq rt (x)-1 sq rt (x))
x^(3/2) [ x^(1/2) - x^(-1/2) ] [distribute x^(3/2) over both terms in the brackets ]
x^(3/2) * x^(1/2) - x^(3/2)* x^(-1/2) [ use the rule that x^m * x^n = x^(m + n) ]
x^( 3/2 + 1/2) - x^(3/2 - 1/2) [simplify the exponents ]
x^2 - x