Nilai dari integral x (x2+5)8 dx

u = x²+5
u' = 2x
x dx  = 1/2 du
∫x(x²+ 5)⁸ dx =  ∫ 1/2  (u)⁸ du = 1/2 . 1/9. u⁹ + c = 1/18 (x²+5)⁹ + c