q=4p+5rq = 4p + 5rq=4p+5r
p=7p = 7p=7 r=−3r = -3r=−3
Work out the value of qqq.
Hence, work out the value of q2q^2q2.
296 exam-style questions on OCR GCSE Maths Substitution. Each one has a worked solution and a mark scheme showing where the marks go.