we can solve it by |dw:1358846643095:dw|
int of u * v + int( int v * u) +c
i think by this u can get the ans
if you do u substitution would it be the same answer?
\[\int\limits 5 \sqrt(2-7 x) x dx = -2/147 (2-7 x)^(3/2) (21 x+4)+constant\]
substitution and integration by parts will differ by a constant.