How do I work 9g-rm-9m+rg
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How do I work 9g-rm-9m+rg
Do you have to factorise?
Group what you see are similar in any two terms.
For example, if you had ab + because + cd, you could see that the first two have be in common, or the last two have c in common. Two different ways are:
b(a+c) + cd --or-- ab + c(b+d)
Try doing the same for your question.
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