Use the substitution u=x3+5u = x^3 + 5u=x3+5 to find ∫3x2x3+5dx\displaystyle \int \frac{3x^2}{x^3 + 5} dx∫x3+53x2dx
95 exam-style questions on OCR A Level Maths 1.8.8 Integration by substitution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.