document.write( "Question 1199500: x^4 +6x^3 +7x 2 −6x−8 ; x+2 and x+4 \n" ); document.write( "
Algebra.Com's Answer #833422 by josgarithmetic(39618)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "You want to find if the last two expressions are factors of the degree-four polynomial expression?\r
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\n" ); document.write( "\n" ); document.write( "One way is to try this:
\n" ); document.write( "Let x=-2.
\n" ); document.write( "Substitute into the polynomial. Result 0 or not?
\n" ); document.write( "Let x=-4.
\n" ); document.write( "Substitute into the polynomial. Result 0 or not?\r
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\n" ); document.write( "\n" ); document.write( "Something is not right in the first expression (polynomial?). Missing exponentiation symbol?
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\n" ); document.write( "Anyway, if you divide using either polynomial division or synthetic division successively for the two binomials, the result will give you \"x%5E2-1\";
\n" ); document.write( "so you could say the given polynomial (degree four) is
\n" ); document.write( "\"%28x%5E2-1%29%28x%2B2%29%28x%2B4%29\"
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