You can put this solution on YOUR website! You did not tell what you want to learn, know, or understand.
You want to find if the last two expressions are factors of the degree-four polynomial expression?
One way is to try this:
Let x=-2.
Substitute into the polynomial. Result 0 or not?
Let x=-4.
Substitute into the polynomial. Result 0 or not?
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Something is not right in the first expression (polynomial?). Missing exponentiation symbol?
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Anyway, if you divide using either polynomial division or synthetic division successively for the two binomials, the result will give you ;
so you could say the given polynomial (degree four) is
.
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