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Class 10 maths

Quadratic equations by factorisation and formula answer key

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Answers

  1. x = 3 or x = 8
  2. x = −3, a repeated root
  3. x = 0 or x = 4
  4. The discriminant is −31. There are no real roots.
  5. x = 1 ± √3
  6. Width 6 cm, length 9 cm. Solve w(w + 3) = 54 and use the positive root.