Past Papers’ Solutions | Edexcel | AS & A level | Mathematics | Core Mathematics 1 (C1-6663/01) | Year 2010 | January | Q#5

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Question

Solve the simultaneous equations

Solution

We are given simultaneous equations;

We rearrange the first equation to find y in terms of x.

Substituting this  from first equation in the second equation;

We have the algebraic formula;

Therefore;

Now we have two options.

By substituting one-by-one these values of  in first equation, we can find corresponding values of .

For

For

Hence, there are following two solutions of the given simultaneous equations;

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