You can't separate functions that way . . .
Note that: .
Now integrate: .
the integral sign and then x^3 sqrt of x
i know the integral of x^3= x^4/4 +C
i know the integral of the sq rt of x= 2X^(3/2)/3 +C
but when i multiply these together im not getting 2x^(9/2)/9 +C as my answer
please show me where i am going wrong