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Polynomial questions

Add or Subtract 
Add or Subtract
Add or Subtract
Add or Subtract
Find the missing polynomial
(2x^3-4x^2-7x+19)+ ? =x^2+3x+24
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1 Answer

1/3: Just drop the ( ) and combine like terms (anything that have EXACTLY the same number of variables)
2/4: DISTRIBUTE the - to the SECOND polynomial, so CHANGE THE SIGN of EVERYTHING in the second set of parenthesis (), THEN combine like terms.
5: rearrange the problem to get a SUBTRACTION problem, and then follow the "directions" for #'s 2/4.
I can upload a video with all the work if that helps.