SOLUTION: perform the operations as described. subtract the sum of 8n^2-9n-2 and -3n^2+n+4 from -13n^2-n+9

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: perform the operations as described. subtract the sum of 8n^2-9n-2 and -3n^2+n+4 from -13n^2-n+9      Log On


   

Question 215240: perform the operations as described.
subtract the sum of 8n^2-9n-2 and -3n^2+n+4 from -13n^2-n+9
Answer by tutor_paul(519) About Me  (Show Source):
You can put this solution on YOUR website!
First, find the sum of 8n^2-9n-2 and -3n^2+n+4. To do this, combine "like" terms. Like terms are those which have the same exponent of n.
%288n%5E2-9n-2%29%2B%28-3n%5E2%2Bn%2B4%29=5n%5E2-8n%2B2
Next, subtract this from -13n^2-n+9. This is written as follows:
%28-13n%5E2-n%2B9%29-%285n%5E2-8n%2B2%29
change - to a + and invert sign of all terms to right of minus:
-13n%5E2-n%2B9-5n%5E2%2B8n-2
Next, combine like terms again:
highlight%28-18n%5E2%2B7n%2B7%29
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Good Luck,
tutor_paul@yahoo.com