IGCSE Maths / Quadratic equations, curves and inequalities

Forming quadratics from a context revision notes

Edexcel International GCSE Maths (4MA1), chapter 22: Quadratic equations, curves and inequalities, specification point 2.7c. Part of the full course.

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Form a quadratic by expressing the context in terms of an unknown, then rearrange so one side is zero and solve. Check the roots against the situation, because an algebraic solution may not make sense in context.

More lessons in Quadratic equations, curves and inequalities

• Solving quadratics by factorising
• Completing the square
• Completing the square with a negative coefficient
• Solving quadratics by completing the square
• The quadratic formula
• Drawing a quadratic curve
• Reading roots and the turning point from a curve
• Quadratic inequalities