Answer
$12x^3+4x^2+12x-14$
Degree: 3
Work Step by Step
$(17x^3 - 5x^2 + 4x - 3) - (5x^3 - 9x^2 - 8x + 11)= 17x^3 - 5x^2 + 4x - 3-5x^3 + 9x^2 +8x - 11=12x^3+4x^2+12x-14$
For monomials with the same power, you can add their coefficients to combine them.
The degree of a polynomial is the highest power.
