Use your calculator to work out the positive value of x x\,x in 12.36−5.12x2=0.3\displaystyle \frac{\sqrt{12.36 - 5.12}}{x^2}=0.3x212.36−5.12=0.3
Write down all the figures on your calculator display.
Write your answer to part (a) correct to 2 decimal places.
192 exam-style questions on OCR GCSE Maths Using a Calculator. Each one has a worked solution and a mark scheme showing where the marks go.