Consider the polynomial p(x)=2x3+2x2+34x+30\displaystyle {p}{\left({x}\right)}=-{2}{x}^{{3}}+{2}{x}^{{2}}+{34}{x}+{30} and the completed synthetic division exercise below.

5\displaystyle {5}       2\displaystyle -{2}    2\displaystyle {2}    34\displaystyle {34}    30\displaystyle {30}
     10\displaystyle -{10}    40\displaystyle -{40}    30\displaystyle -{30}
     2\displaystyle -{2}    8\displaystyle -{8}    6\displaystyle -{6}    0\displaystyle {0}

The above result indicates that what value is a root of p\displaystyle {p}?

x=\displaystyle {x}=

Based on the above result, p\displaystyle {p} can be factored as

p(x)=\displaystyle {p}{\left({x}\right)}=