anonymous
  • anonymous
Combine the like terms to simplify the expression: 4 + 7xy2 + 5y3 + 10x –4xy2 – 8x – 4y3 + 9 A. y6 + 3x2y2 + 10x + 13 B. y3 + 3xy2 + 2x + 13 C. y3 + 3xy2 + 10x + 13 D. y3 – 3xy2 + 2x + 9
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
anonymous
  • anonymous
constants: 4+9 = 13 xy^2: 7-4 = 3xy^2 y^3: 5-4 = y^3 x: 10-8 = 2x y3 + 3xy2 +2x +13 (answer B) am i right
anonymous
  • anonymous
Look at all the terms to see which terms happen more than once. The + or - sign in front of the term tells you whether it's positive or negative. Then add together all the sets of terms which are the same. Put the term with the highest exponent first, then put in the rest of the exponents in descending order. 4+9= 13 7xy2+(-4xy2)= 3xy2 5y3+(-4y3)= y3 10x+(-8x)= 2x 13+3xy2+y3+2x y3+3xy2+2x+13

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anonymous
  • anonymous
it's c
anonymous
  • anonymous
c y3+3xy2+2x+13
anonymous
  • anonymous
oh do you guys agree?
purplemexican
  • purplemexican
i get 3xy2+y3+2x+13
anonymous
  • anonymous
You're correct. It's B
anonymous
  • anonymous
yeah c y3 + 3xy2 +2x +13
anonymous
  • anonymous
yea B
anonymous
  • anonymous
wait.
anonymous
  • anonymous
OH LOL
anonymous
  • anonymous
yep
anonymous
  • anonymous
yeah i got y3 + 3xy2 +2x +13 and saw c right away xD
purplemexican
  • purplemexican
i got what looks like c in an odd order 3xy^2+y^3+2x+13
anonymous
  • anonymous
lol

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