(−36ac) ÷ (−9) ??????

2008-10-10 3:47 pm
Option A: 4ac

Option B:¼ac

Option C: -¼ac

Option D: -4ac

Which of the following?

回答 (10)

2008-10-10 3:51 pm
✔ 最佳答案
(A) 4ac








..
2008-10-10 3:57 pm
Hi,

For this question, we have the following: -36ac / -9

Now, notice that we are dividing by a constant, -9 and don't notice anywhere else in the problem where ac are present other than in the numerator. Therefore, we are basically dividing -36 by -9 and then multiply by ac to get:

[-36/-9]ac

Which you should recall is going to be a positive result since negative divided by negative is positive. Our expression then becomes:

FINAL ANSWER: 4ac [Option A]

I hope that helps you out! Please let me know if you have any other questions!
參考: College Calculus Student ; Math Tutor
2008-10-10 3:56 pm
Option A
2008-10-10 3:51 pm
-36ac/-9 = 4ac (since a negative divided by a negative = a positive #)
2008-10-14 7:15 pm
(-36) a c
--------------
(-9)

4 a c
OPTION A
2008-10-10 4:47 pm
(-36ac)/(-9)
= [(-36)/(-9)]ac
= 4ac
(option A)
2008-10-10 4:03 pm
-36ac/-9
= 36ac/9
= 4ac
2008-10-10 3:58 pm
a
-36/-9=4
replace the ac

4ac
2008-10-10 3:58 pm
Any two negatives divided or multiplied together will result in a positive number. So, to simplify these types of equations, you just have to get rid of the negative signs. This leaves you with

36ac divided by 9

to get option A (4ac)

Just be careful when applying this to more than two negatives.
2008-10-10 3:49 pm
4ac.

-36ac / -9
-36 / -9 = 4
So.. the answer is 4ac.


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