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ale4655 [162]
3 years ago
7

Pls help i don’t understand

Mathematics
1 answer:
kirill [66]3 years ago
8 0

Answer:

r + 7 is a factor.

Step-by-step explanation:

You have to divide 3r^{4} +23r^{3} +15r^{2} +r - 42 by r + 7.  If the remainder is 0, then r + 7 is a factor of  3r^{4} +23r^{3} +15r^{2} +r - 42.

I did that and the remainder was 0.

So, yes, r + 7 is a factor.  

You will need to learn how to do that division in order to solve this problem.  OK?  

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