IGCSE Maths / Advanced algebra
Simultaneous equations, one linear and one quadratic revision notes
Edexcel International GCSE Maths (4MA1), chapter 23: Advanced algebra, specification point 2.7d. Part of the full course.
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Solve a pair of simultaneous equations by substituting the linear equation into the quadratic one. This gives two possible x-values, each of which must be matched with its own y-value and written as a pair.