x²Quadratic equations: math practice, grade 8

Practise “Quadratic equations” online for free. Five right answers in a row make the tasks harder, two mistakes in a row make them easier. Right answers earn coins for games.

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Example problems

These are only examples: the practice makes new tasks every time.

1. Find the roots of the equation.

   x² = 36

   Answer

   −6, 6

2. Find the roots of the equation.

   x² − 4x = 0

   Answer

   0, 4

3. Find the roots of the equation.

   x² − 6x + 8 = 0

   Answer

   2, 4

4. Find the roots of the equation.

   x² − 12x + 35 = 0

   Answer

   5, 7

5. Find the roots of the equation.

   x² + 4x − 12 = 0

   Answer

   −6, 2

6. How many roots does the equation have?

   x² − 4x + 13 = 0

   Answer

   0

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