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One term, and every place the course uses it — the revision notes that teach it, the multiple choice questions that check it, and the detailed questions that examine it.

7 sub-topics use quadratic formula

  1. Edexcel · Mathematics · 2 Algebra

    2.3Solving equations and inequalities

    zero — so each bracket is set to zero in turn. When it will not factorise, use the quadratic formula: x = ( −b ± √(b² − 4ac) ) ÷ 2a The ± is what gives the two solutions. Completing the square

    in Linear and quadratic equations and 1 other section

    Study notes2Multiple choice26Detailed questions13

  2. Edexcel · Mathematics · 2 Algebra

    2.1Notation, vocabulary and manipulation

    data_table ab a × b The multiplication sign is dropped between letters 3y y + y + y, or 3

    in Notation and vocabulary

    Study notes1Multiple choice16Detailed questions14

  3. Edexcel · Mathematics · 2 Algebra

    2.2Graphs

    solutions of the equation when y = 0. Deduce them algebraically by factorising or by the quadratic formula. • The y-intercept — where it crosses the y-axis, found by substituting x = 0, which is simply the constant

    in Quadratic graphs and 1 other section

    Study notes2Multiple choice9Detailed questions11

  4. Edexcel · Mathematics · 2 Algebra

    2.4Sequences

    Used in 17 questions on this sub-topic.

    Study notesMultiple choice8Detailed questions9

  5. Edexcel · Mathematics · 5 Probability

    5.1Probability

    Used in 2 questions on this sub-topic.

    Study notesMultiple choice1Detailed questions1

  6. Edexcel · Mathematics · 4 Geometry and measures

    4.2Mensuration and calculation

    Used in 1 question on this sub-topic.

    Study notesMultiple choice1

  7. Edexcel · Mathematics · 3 Ratio, proportion and rates of change

    3.1Ratio, proportion and rates of change

    Used in 1 question on this sub-topic.

    Study notesDetailed questions1