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# Maths watch

1. 4b^5 * 3b^7
___________
b^4

does this simplify to 12b^4 or 12b^8?

or what?
2. (Original post by Adam Yauch)
4b^5 * 3b^7
___________
b^4

does this simplify to 12b^4 or 12b^8?

or what?

Hi i've just tried workin out the answer, i got 12b^10
3. (Original post by Babygal)
Hi i've just tried workin out the answer, i got 12b^10

sorry no the answer is definitely 12b^8 you were right
4. thanks
5. (Original post by Adam Yauch)
thanks
4b^5 * 3b^7
-------------
b^4

simplify top line:

12b^12
-------
b^4

(as 12/1 = 12, and we deduct 4 from 12 to get the new power of 8; as we r dividing)
6. I got 12b^8 too
7. (Original post by Adam Yauch)
4b^5 * 3b^7
___________
b^4

does this simplify to 12b^4 or 12b^8?

or what?
(4bbbbb x 3bbbbbbb) / bbbb

= 12bbbbbbbbbbbb / bbbb

cancelling

= 12bbbbbbbb

= 12b^8

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