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No m8 the (1+2) is in the denominator. If it was in the numerator then yes it would be 9. You have to clarify these things.
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Use any scientific calculator and you'll be 9. My math professor also says its 9.
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Because you aren't typing it in correctly. You probably didn't write it correctly. The way you wrote it makes it seem like the (1+2) is the denominator. If you put 6÷2 in parenthesis then yes it would be 9.