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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} - 169
  3. x^{2} - 4
  4. x^{2} - 25
  5. x^{2} - 196
  6. x^{2} - 81
  7. x^{2} - \frac{1}{49}
  8. x^{2} - 64

    9. Factorise fully the expressions below.

  9. 100x^{2} - 169
  10. 25x^{2} - 36
  11. 225x^{2} - 4
  12. 225x^{2} - 4
  13. 225x^{2} - 49
  14. y^{2} - b^{2}
  15. 49b^{2} - 25y^{2}
  16. 225z^{2} - 196y^{2}