原式=(2*5/4)√{[(a²-b²)*(x^4)*b]/[6x²*3*(a+b)*(a-b)]}
=(5/2)√{x²b/18}
=(5/2)*(√2/6)*√{x²b}
=(5√2/12)√{x²b}
当x≥0时,原式=(5√2/12)x√b
当x<0时,原式=-(5√2/12)x√
原式=(2*5/4)√{[(a²-b²)*(x^4)*b]/[6x²*3*(a+b)*(a-b)]}
=(5/2)√{x²b/18}
=(5/2)*(√2/6)*√{x²b}
=(5√2/12)√{x²b}
当x≥0时,原式=(5√2/12)x√b
当x<0时,原式=-(5√2/12)x√