Answer:
p(x) = x⁴ +12x³ +48x² +64x
Step-by-step explanation:
If -4 is a zero, then (x -(-4)) = (x +4) is a factor. If its multiplicity is 3, then it is a factor 3 times. The other factor is (x-0) = x, so the function is ...
p(x) = x(x +4)³
Expanding gives ...
p(x) = x⁴ +12x³ +48x² +64x
