anonymous
  • anonymous
Simplify. (3x2 + 2x + 7x3) + (10x2 + 6x + 9) A) 7x3 + 13x2 + 8x + 9 B) 7x3 + 30x2 + 12x + 9 C) 13x2 + 8x + 16x3 D) 13x4 + 7x3 + 8x2 + 9 @itzhannahx
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
|dw:1446254506380:dw|
campbell_st
  • campbell_st
|dw:1446254685407:dw|
anonymous
  • anonymous
|dw:1446254666314:dw||dw:1446254875139:dw|

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More answers

anonymous
  • anonymous
i just need the answer so i can go to bed
jim_thompson5910
  • jim_thompson5910
You can type `7x^2` to mean \(\Large 7x^2\) (so you don't have to draw it out)
jim_thompson5910
  • jim_thompson5910
do you see how @campbell_st circled the like terms?
anonymous
  • anonymous
ya but i just am in a rush
jim_thompson5910
  • jim_thompson5910
what is `3x^2` plus `10x^2` equal to?
anonymous
  • anonymous
13x^4
jim_thompson5910
  • jim_thompson5910
you don't add the x^2 like that to get x^4 think of it like this: 3 apples + 10 apples = 13 apples
jim_thompson5910
  • jim_thompson5910
x^2 is different from x^4 you can't say 3 apples + 10 apples = 13 (something else)
jim_thompson5910
  • jim_thompson5910
so it should be \(\Large 3x^2 + 10x^2 = 13x^2\)
anonymous
  • anonymous
ok
jim_thompson5910
  • jim_thompson5910
what is 2x + 6x equal to?
anonymous
  • anonymous
8x
jim_thompson5910
  • jim_thompson5910
good
jim_thompson5910
  • jim_thompson5910
there are no other like terms, so we cannot combine them for example, we can't say 3x^2 + 8x is equal to 11x or 11x^2
anonymous
  • anonymous
ok
jim_thompson5910
  • jim_thompson5910
at this point you probably see the answer
anonymous
  • anonymous
its C
jim_thompson5910
  • jim_thompson5910
you sure?
anonymous
  • anonymous
???????
jim_thompson5910
  • jim_thompson5910
you mistakenly added 7x^3 and 9 to get 16x^3. That's a common fallacy
anonymous
  • anonymous
its D

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