SOLUTION: Add the polynomials. Show all work. (sn-4n^2+7)+(7n^2+5n-6) Subtract the polynomials. Show all work. (7y^3+4y^2-5y+3)-(8y^3-4y^2-2y+2)

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Add the polynomials. Show all work. (sn-4n^2+7)+(7n^2+5n-6) Subtract the polynomials. Show all work. (7y^3+4y^2-5y+3)-(8y^3-4y^2-2y+2)      Log On


   

Question 443671: Add the polynomials. Show all work.
(sn-4n^2+7)+(7n^2+5n-6)
Subtract the polynomials. Show all work.
(7y^3+4y^2-5y+3)-(8y^3-4y^2-2y+2)
Answer by oberobic(2304) About Me  (Show Source):
You can put this solution on YOUR website!
Adding.
%28sn-4n%5E2%2B7%29%2B%287n%5E2%2B5n-6%29
Assuming "sn" is really 2n, and that each = 0.
Reorganize the first equation to align the elements.
2n-4n%5E2%2B7+=+0
-4n%5E2+%2B2n+%2B+7+=+0
Add
-4n%5E2+%2B2n+%2B+7+=+0
7n%5E2+%2B+5n+-6+=+0
3n%5E2+%2B+7n+%2B+1+=+0
.
Subtracting
7y%5E3%2B4y%5E2-5y%2B3+=+0
8y%5E3-4y%5E2-2y%2B2+=+0
-y%5E3+%2B8y%5E2+-3y+%2B+1+=+0
.
Done