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Answered 2016-06-05 18:40:32

Here are some methods you can use:* Trial and error. This works especially well if the solution is a small integer.

* Factoring. You must first write the equation in such a form that you have zero on the right.

* Completing the square.

* Using the quadratic formula.

The last two methods work in all cases. The quadratic formula is easier to work with in the general case.

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Answered 2016-06-06 08:10:23

The following are some ways:

  • plot the graph
  • factorise the quadratic
  • complete the squares
  • use the quadratic formula
  • iteration eg Newton-Raphson method
  • trial and improvement
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