Question

Help Please!!
Add: (x^5-4x^4+7x^3+8), (9x^3+7x^2-10) and (-2x^5+7x^4-3x+8)

Answer 1

Let's call these polinomials \(P_1, P_2,P_3\) and efectuate the operation sum to them:
\[+:P_1\times P_2\times P_3 \iff P_1+ P_2 + P_3\]
This ending result translates into:
\[(x^5-4x^4+7x^3+8)+(9x^3+7x^2-10)+(-2x^5+7x^4-3x+8)\]

Answer 2

The rest is just a matter of adding the coefficients with "x"s that have the similar exponent.

Answer 3

@Owlcoffee

I still don't understand