SOLUTION: Can anyone help me with this problem? I am seriously lost. Thanks so very much!!!! Add (2a^4-4a^3+4a^2+15a-8)+(a^5+11a^3+6a^2-4a+4)+(-5a^4+a^2-7a-7)

Question 615466: Can anyone help me with this problem? I am seriously lost. Thanks so very much!!!!
Add (2a^4-4a^3+4a^2+15a-8)+(a^5+11a^3+6a^2-4a+4)+(-5a^4+a^2-7a-7)
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
(2a^4-4a^3+4a^2+15a-8)+(a^5+11a^3+6a^2-4a+4)+(-5a^4+a^2-7a-7)

2a^4-4a^3+4a^2+15a-8+a^5+11a^3+6a^2-4a+4-5a^4+a^2-7a-7

(a^5)+(2a^4-5a^4)+(-4a^3+11a^3)+(4a^2+6a^2+a^2)+(15a-4a-7a)+(-8+4-7)

a^5-3a^4+7a^3+11a^2+4a-11

So (2a^4-4a^3+4a^2+15a-8)+(a^5+11a^3+6a^2-4a+4)+(-5a^4+a^2-7a-7) simplifies to a^5-3a^4+7a^3+11a^2+4a-11

In other words, (2a^4-4a^3+4a^2+15a-8)+(a^5+11a^3+6a^2-4a+4)+(-5a^4+a^2-7a-7) = a^5-3a^4+7a^3+11a^2+4a-11

for all values of 'a'
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