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hello grant knives welcome to lesson 2 on factorizing and today were going to look at the sign change rule this happens when brackets looks similar but Im not exactly the same and were going to see what happens so lets look at our examples for today so instruction is still to factorize so were still looking for an h CF taking out something thats in common but what do we notice yesterday we looked at common brackets when the brackets looked exactly the same but can you see how this brackets does not look exactly the same like this right thats similar they both have an X they both have a 3 but theyre not exactly the same why not in this example my X is positive but in this example my X negative and in this example my 3 is negative but in this example my 3 is positive sorry and this term and in this journal example but you can see so the brackets are similar theyre not exactly the same to make them the same we apply the sign change rule and thus unchanged rule says that if I chan