Answer:
a^3b+a^2b+b^3
Step-by-step explanation:
A fourth degree polynomial has the highest power of degree 4 when you sum the powers in each term
) a^6+a^5b+a^4b^2+a^3b^3 degree 6
2) a^3b+a^2b+b^3 3+1 = 3 degree 4
3) a^4+a^2b^3 2+3 = degree 5
4) 4a^3 degree 3
