Locating zeros of polynomial functions

Step-by-step explanation:

The given polynomial function is;

According to the rational roots theorem, the possible rational roots are

We now use the remainder theorem to obtain;

This implies that, is a zero.

Also,

This means that, is also a zero.

Hence the zeros are

2/3=10/15

1/5=3/15

10+3=13/15

2 13/15 is the answer