# How do you factor #x^2 - 7x + 12#?

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#### Explanation

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We are looking for factors of 12 which ADD (because of + 12) up to 7.

The signs will be the same (because of + 12), they are both negative (because of -7).

The factors which satisfy both conditions are

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Let's look at the possible combinations of factors of

In order to factorise easily you have to know the multiplication tables well. Without that it is a long slog with lots of trial and error!

Learn the tables!

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