Mathematics · May / June 2026 · Paper 22 · Question 6

86 [2]

M1 for 5 × 18 – 22 2

or B1 for 18 or 90 or –4

+ 2 [c =] [] E d ± oe final answer 5 [5]

e.g. E + d2 = 5c2, –5c2 = –E – d2 3

M1 for isolating the term in c + 2 − − 2 E d E d = 2 2 = e.g. c , c

M1 for division by 5 − 5 5 + E d 2

M1 for square rooting = c . For this M1, c2 must become c. 5 Mark third M1 on the final answer Mark on completion of move. Maximum 2 marks if answer M marks can be awarded in any order, e.g. incorrect 2 E d 2 E d 2 E d = 2 + then − = c then 2 − = c c 5 5 5 5 5 5 Note: the root symbol in the final answer should extend across the full fraction, minimally beyond the plus sign and below the fraction line.