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GCSE Maths

Algebra

Completing the Square

Completing the Square

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Practice Questions and Resources

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Everything you need to master this topic.

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Workpack

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Solutions

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Level 7–9
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Key Points 

  • Half the coefficient of x.

  • Square it.

  • Add and subtract the same value.

  • Write as:(x+a)²+b

  • Useful for graph sketching and solving quadratics.


Keywords: completing the square, vertex form.

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