Question

int(x^2*sqrt(x-1), x = 1 .. 2)

Answer 1

do the substitution u=x-1

Answer 2

making du=dx

Answer 3

so you get int(x^2*sqrt(u) ...which to me is no help

Answer 4

as u=x-1, x = u+1
you will change x^2 to (u+1)^2 too :)
now try..

Answer 5

oh lol.....thank you! just having that moment!

Answer 6

welcome ^_^

Answer 7

well..wait...ha....i am getting (u+1)^2*sqrt(u) ..i can't simplify anymore to get a known integral