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Simplify the following:  

$(2y-1)\cdot(4y^{10}+2y^9+4y^8+2y^7).$

Express your answer as a polynomial with the degrees of the terms in decreasing order.

 Feb 14, 2021
 #1
avatar+544 
+1

(2y - 1)(4y10 + 2y9 + 4y8 + 2y7)

 

= 8y11 + 4y10 + 8y9 + 4y8 - 4y10 - 2y9 - 4y8 -2y7

 

8y11 + 6y9 - 2y7

 Feb 14, 2021
 #2
avatar+113657 
+1

Log, please do not do all of Clair's homework for her.

 Feb 14, 2021
 #3
avatar+193 
-3

I'm actually helping someone else do their homework. I don't want to give them the wrong answers.

 Feb 14, 2021
 #4
avatar+113657 
+1

Your talking rubbish Claire.

Do you think we are all idiots here.

 

You are a  cheat. Pure and simple.

Melody  Feb 14, 2021
 #5
avatar+2184 
+2

Maybe they actually are, though. But Claire, if you actually do not know or aren't sure, I think you should tell them the truth instead of doing something that might count as cheating. Don't let others take advantage of you, and if they really are a friend with help give them advice on a good tutor or teacher. Good luck!

CalTheGreat  Feb 15, 2021

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