Quadratics & the Discriminant | OCR A A-Level Maths | 40 Worked Examples (H240)

40 fully worked quadratics questions for OCR A A-Level Mathematics (H240, spec 1.02d-f), every line explained and annotated to the real OCR M/A/B/SC mark scheme. Covers solving by factorising, the quadratic formula and completing the square, the discriminant conditions for two distinct, repeated and no real roots, finding a parameter from a discriminant condition, disguised or hidden quadratics (in x squared, root x, e to the x and x to the one third), the tangency and line-meets-curve conditions, and quadratic modelling. Includes the OCR ‘show detailed reasoning’ style, the 3 significant figure convention and a key-facts reference box reminding students that OCR prints no quadratic formula. Progressive difficulty from Easy to Challenging. Ideal for revision, homework and cover lessons.