k=x2−y22z\displaystyle k = \frac{x^2 - y^2}{2z}k=2zx2−y2
x=12x = 12x=12 y=8y = 8y=8 z=4z = 4z=4
Work out the value of kkk.
Practise Edexcel GCSE Maths Substitution with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Maths (1MA1) 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.