5.2.1.Solving Quadratic Equations by Factorization

All Questions
Solution of x<sup>2<sup> -9 = 0 is:

  {9}
  {<math><mo>&#xB1;</mo><mn>9</mn></math>}
  {<math><mo>&#xB1;</mo><mn>3</mn></math>}
  {3}