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QMMaths

Difference of two squares (DOTS)

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Answers

    Factorise fully the expressions below.

  1. x^{2} - 9
  2. x^{2} - 16
  3. x^{2} - 225
  4. x^{2} - 100
  5. x^{2} - 25
  6. x^{2} - 196
  7. x^{2} - \frac{1}{4}
  8. x^{2} - 49

    9. Factorise fully the expressions below.

  9. 81x^{2} - 100
  10. 225x^{2} - 4
  11. 49x^{2} - 169
  12. 121x^{2} - 225
  13. 4x^{2} - 25
  14. a^{2} - x^{2}
  15. 25c^{2} - 4a^{2}
  16. 121y^{2} - 100b^{2}