Factorise fully 30a2+40ab30a^2 + 40ab30a2+40ab
Solve 3(g+k)=213(g + k) = 213(g+k)=21
Give your answer in terms of kkk.
261 exam-style questions on OCR GCSE Maths Expanding and Factorising. Each one has a worked solution and a mark scheme showing where the marks go.