Asked by Anonymous

Evaluate the following indefinite integrals using substitution

a) ∫ xsqrt(x^2-7) dx
b) ∫ x^(2/3)(1/5x^(5/3)+2)^4 dx
Answered by Steve
(a) u = x^2-7
(b) u = 1/5 x^(5/3) + 2