5y(-y^2-7y)

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\[5y(-2y ^{2}-7y)\]
so what do you know to do to this problem?
i dont know how to do these types of problems im home sick today and this is the practice problems the teacher wants me to do to turn in tomorow to see if i need to do the assighnment or not

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Other answers:

ok... lets review some basic concepts then ok.
to make it easier, lets do this: 3(8) = 24 right?
yeah
then this should also equal 24: 3(6+2) = 24 ...make sense?
yeah
good, now how do we prove this? we "distibute" that 3 thru the (6+2) like this, just multiply it thru... 3(6) + 3(2) = 24 18 + 6 = 24 24 = 24.... Do you see how I did that?
distribute is the word I was trying to type :)
yeah so if i do that for this problem i end up with -45y^{2} would that be correct
-45y squared
not yet, there are a few more things to iron out...
you see the "y"'s in there....they play by the same rules, but with a difference result
so it would be just -45?
quit trying to jump ahead of the curve, if you simply want ananswer to it it aint gonna be useful to you..... we will get to the answer soon enough :)
do you know how the rules of positive and negatives work with multiplication? (+)(+) = (+) (-)(-)=(+) (-)(+)=(-) do you know these rules?
yes
good, then the only thing left to do is to figure out what to do with they "y"s :)
y^2 means that you have 2 little y's that have been pushed together like this: yy = y^2 y^5 means 5 little y's are pushed together like this: yyyyy = y^5 does that make sense?
yeah
good, when we multiply these y's together, we simply add up all the little y's together, for example: y^2 times y^5 = yy yyyyy = yyyyyyy = y^7 y^1 times y^3 means y yyy = yyyy = y^4 does that make sense?
yea
then lets step thru your problem and use this understanding to get the answer :) ok?
ok
5y(-y^2-7y) lets distribute that 5 thru to get: 5(-y^2) + 5(-7y) = (-10y^2 -35y) now were left with that y on the outside to distribute thru like this: y(-10y^2 -35y) y(-10y^2) + y(-35y) -10yyy + -35yy = -10y^3 -35y^2 and thats as far as we can take it
and I messed it up lol.....
5(-y^2) = -5y^2...
copy edit repaste...
5y(-y^2-7y) lets distribute that 5 thru to get: 5(-y^2) + 5(-7y) = (-5y^2 -35y) now were left with that y on the outside to distribute thru like this: y(-5y^2 -35y) y(-5y^2) + y(-35y) -5yyy + -35yy = -5y^3 -35y^2 and thats as far as we can take it
so then the answer would be -5y^3-35y^2?
yep, thats the answer
oh ok thanks
youre welcome

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