Answer :
Any polynomial of degree of n have n roots (real and complex ones).
If we take into account only real roots, then a polynomial of degree of n can have n real roots at most.
In this case, the polynomial can have 3 real roots at most.
If we take into account only real roots, then a polynomial of degree of n can have n real roots at most.
In this case, the polynomial can have 3 real roots at most.