anonymous
  • anonymous
–3(–4y + 3) + 7y Combine like terms
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
is the answer 19y^2 - 3 or 19y -9 ?
DebbieG
  • DebbieG
Which do you think? :)
anonymous
  • anonymous
those are both the answers I came up with... i just solved the problem two different ways hahaha I'm not sure which way is the right way to solve it

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DebbieG
  • DebbieG
OK, well.... one of the ways you did it is right and one is wrong. :) Here is the right way: –3(–4y + 3) + 7y distribute = 12y - 9 + 7y put like terms together = 12y + 7y -9 add like terms = 19y - 9 You can't get a y^2 term from there, because there is NOWHERE that you are multiplying that y by another factor of y. And I have no idea where the -3 would come from either.... so whatever you did to get THAT answer is wrong. If you want to show me what you did, I can walk you through where your error is.
anonymous
  • anonymous
I distributed the -3 at the beginning
DebbieG
  • DebbieG
ok, that's correct - you should get 12y - 9 + 7y and then?
anonymous
  • anonymous
Ohhhhhh I see what I did! I forgot to distribute the -3 to the positive 3 lol
DebbieG
  • DebbieG
OK, that still doesn't explain how you had a -3 instead of 3 (I guess you distributed the "-" but not the 3? lol) or how you got the y^2... you can't get y^2 from y, unless you multiply by another y. :) But as long as you see what you did wrong and won't do it next time, that's all that matters!! :)
DebbieG
  • DebbieG
Oh, I think you added 12y + 7y and made it 19y^2? but you see why that doesn't work now, right? :) When you add like terms, you JUST add together the coefficients!
anonymous
  • anonymous
Haha yes thats exactly what I did.. thank you :)
DebbieG
  • DebbieG
you're welcome. :)

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