hyflex Grade 9

1. Which of the following illustrates a quadratic equation?

2. Which of the following statements is true about quadratic equation?

• It is an equation of degree 2.

• It is similar to linear equation.

• The quadratic term can have a numerical coefficient of 0.

• a = 1; b = 0; c = 1

• a = 1; b = -2; c = 1

• a = 1; b = 0; c = -1

• a = 1; b = 2; c = 1

• 3

• 6

• 9

• 12

9. The following statements is true about discriminant, EXCEPT

• If d = 0, then the nature of its roots is real and equal.

• If d < 0, then the nature of its roots has no real roots or solution.

• If d > 0 and a perfect square, then the nature of its roots is rational and equal

• If d > 0 and not a perfect square, then the nature of its roots is irrational and not equal

• D = 0

• D = 3

• D = 12

• D = 27