Quadratic equations

Class 10 · Mathematics · 6 questions

Name: ____________________   Date: ____________

1. Solve x2 - 5x + 6 = 0.

   • A x = 2 or 3
   • B x = 1 or 6
   • C x = 5 or 1
   • D x = -2 or -3

2. The roots of x2 = 16 are:

   • A 4 and -4
   • B -4 only
   • C 8
   • D 4 only

3. The quadratic formula gives x equal to:

   • A (b plus or minus 2ac) / 4
   • B -b / 2a only
   • C (-b plus or minus the square root of (b2 - 4ac)) / 2a
   • D (-b plus or minus the square root of (b2 + 4ac)) / a

4. Solve x2 + 2x - 8 = 0.

   • A x = 1 or -8
   • B x = 2 or -4
   • C x = -2 or 4
   • D x = 8 or -1

5. Which of these is a quadratic equation?

   • A x2 + 2x + 1 = 0
   • B 2x + 3 = 0
   • C 1/x = 2
   • D x3 = 8

6. Solve 2x2 - 8 = 0.

   • A x = 4
   • B x = 8
   • C x = 2 or -2
   • D x = 0