Question 80

If $$\sqrt{15 - 2\sqrt{35} - 2\sqrt{15} + 2\sqrt{21}} = \sqrt{a} - \sqrt{b} + \sqrt{c}$$ then $$a^2 - c^2 =$$

Create a FREE account and get:

  • Download Maths Shortcuts PDF
  • Get 300+ previous papers with solutions PDF
  • 500+ Online Tests for Free