Use the substitution u=x2+4u = x^2 + 4u=x2+4 to find ∫2xx2+4dx\displaystyle \int \frac{2x}{x^2 + 4} dx∫x2+42xdx
Practise Edexcel A Level Maths 11.5 Integration by Substitution with exam-style questions for A Level Maths. 59 questions, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.