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Marianne Hagenes

Lvl 10
4y ago

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Wiki User

12y ago

By looking for common factors between the terms, starting with the numbers and then moving onto the letters, and then taking out these common factors.

The common factor of 3 & 12 is 3;

The common factor of a and a is a

There is no common factors with b.

Putting the common factors together results in 3a to take out:

3a x 1 = 3a

3a x -4b = -12ab

Thus 3a - 12ab = 3a(1 - 4b)

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Q: How do you factorise 3a -12ab?
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