Quadratic Equations Activity-2

Quadratic Equations Activity-2

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

Activity No2 :Determine nature of roots of the quadratic equation.

    x² + 2x - 9 = 0

Solution: Compare x² + 2x - 9 = 0 with ax² + bx + c = 0.

    ∴a = , b = 2, c = ,

∴ b² - 4ac = 2² - 4 X X

           ∴ D = 4 +

           ∴ D = 40

     ∴ b² - 4ac > 0.
∴ The roots of the equation are real and unequal.