a(b+c)Factorising: math practice, grade 7

Practise “Factorising” 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. 35x + 49 = ?

   Answer

   7(5x + 7)

2. 3x² − 7x = ?

   Answer

   x(3x − 7)

3. 9x² − 64 = ?

   Answer

   (3x − 8)(3x + 8)

4. x² − 16 = ?

   Answer

   (x − 4)(x + 4)

5. 9x² − 42x + 49 = ?

   Answer

   (3x − 7)²

6. xy + 6x + 9y + 54 = ?

   Answer

   (x + 9)(y + 6)

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