nilai dari f2x(x2-9)5dx

integral 2x(x^2 -9)^5 dx
= misal u = x^2 -9
du/dx = 2x
dx = du/2x, sehingga
integral 2x.u^5.du/2x
integral u^5 du
= u^(5+1)/(5+1) +c
= {(x^2 -9)^6 } /6 + c