document.write( "Question 1180262: Show all work. Be sure to answer both part A and B to the following questions.\r
\n" ); document.write( "\n" ); document.write( "Part A, Which of the following is a polynomial equation? \r
\n" ); document.write( "\n" ); document.write( "a.6x^2 + x + 2 = (6x-2)(x+4)
\n" ); document.write( "b.(5x-1)^2 = 25x^2 + 1
\n" ); document.write( "c.9(4a^2 - 4ab + b^2) = (6a - 3b)^2
\n" ); document.write( "d.(7x + 2)(x - y) = 7x(x - y) - 2y\r
\n" ); document.write( "\n" ); document.write( "Part B, Which expression is not equivalent to 16x^4 - y^4?\r
\n" ); document.write( "\n" ); document.write( "a.(2x-y)(2x+y)(4x^2 + y^2)
\n" ); document.write( "b.(2x)^4 - (y)^4
\n" ); document.write( "c.4x^2(4x^2 - y^2) + y^2(4x^2 - y^2)
\n" ); document.write( "d.(2x-y)(8x^3 + y^3)
\n" ); document.write( "

Algebra.Com's Answer #809876 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
recall: \r
\n" ); document.write( "\n" ); document.write( "A polynomial function is a function that involves only \"non-negative\" integer \"powers\" or only \"positive\" integer \"exponents\" of a variable in an equation like the quadratic equation, cubic equation, etc. For example, \"2x%2B5\" is a polynomial. As a general rule of thumb if an algebraic expression has a radical in it then it isn't a polynomial.
\n" ); document.write( "A zero polynomial is the one where all the coefficients are equal to \"zero\". So, the degree of the zero polynomial is either \"undefined\", or it is set equal to \"-1\".
\n" ); document.write( "A polynomial function is made up of terms called monomials.\r
\n" ); document.write( "\n" ); document.write( "A monomial is an expression that contains only one term. In other words, a monomial is a polynomial with a single term. Generally, monomials include numbers, variables, or a number and a variable multiplied together, two or more variables multiplied together. A monomial is an expression that does not contain any arithmetic operators.\r
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\n" ); document.write( "\n" ); document.write( "Part A\r
\n" ); document.write( "\n" ); document.write( "a.\r
\n" ); document.write( "\n" ); document.write( " \"6x%5E2+%2B+x+%2B+2+=+%286x-2%29%28x%2B4%29\".....expand
\n" ); document.write( "\"6x%5E2+%2B+x+%2B+2+=+6+x%5E2+%2B+22+x-8\"..........simplify
\n" ); document.write( "\"cross%286x%5E2%29+%2B+x+%2B+2+=+cross%286+x%5E2%29+%2B+22+x+-8\"
\n" ); document.write( "\"x+%2B+2+=++22+x+-8\"
\n" ); document.write( "\"0+=++22+x-x-2+-8\"
\n" ); document.write( "\"0+=++21x-10\"=> polynomial\r
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\n" ); document.write( "\n" ); document.write( "b.\r
\n" ); document.write( "\n" ); document.write( "\"%285x-1%29%5E2+=+25x%5E2+%2B+1\"....expand
\n" ); document.write( "\"25x%5E2+-+10x+%2B+1+=+25x%5E2+%2B+1\"..........simplify
\n" ); document.write( "\"cross%2825x%5E2%29+-+10+x+%2B+1+=+cross%2825x%5E2+%29%2B+1\"
\n" ); document.write( "\"-+10+x+%2B+1+=++1\"
\n" ); document.write( "\"-+10+x+%2B+1-1+=++0\"
\n" ); document.write( "\"-+10x++=++0\"
\n" ); document.write( "\"x++=++0\"=> is polynomial =>classification: a degree \"-infinity\" polynomial with \"1\" term and \"0\" variable\r
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\n" ); document.write( "\n" ); document.write( "c.\r
\n" ); document.write( "\n" ); document.write( "\"9%284a%5E2+-+4ab+%2B+b%5E2%29+=+%286a+-+3b%29%5E2\"....expand
\n" ); document.write( "........simplify
\n" ); document.write( "\"0=0\"=> is polynomial =>classification: is a degree \"0\" polynomial with \"1\" term and \"0\" variable\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "d.\r
\n" ); document.write( "\n" ); document.write( "\"%287x+%2B+2%29%28x+-+y%29+=+7x%28x+-+y%29+-+2y\"....expand
\n" ); document.write( "\"7x%5E2+-+7xy+%2B+2x+-+2y+=+7x%5E2+-+7xy+-+2y\"........simplify
\n" ); document.write( "
\n" ); document.write( "\"+2x+=+0\"
\n" ); document.write( "\"+x+=+0\"=> is a degree \"-infinity\" polynomial with \"1\" term and \"0\" variable\r
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\n" ); document.write( "\n" ); document.write( "Part B\r
\n" ); document.write( "\n" ); document.write( "Which expression is not equivalent to \"16x%5E4+-+y%5E4\"?\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "a.\r
\n" ); document.write( "\n" ); document.write( "\"%282x-y%29%282x%2By%29%284x%5E2+%2B+y%5E2%29\"...expand
\n" ); document.write( "\"%284+x%5E2+-+y%5E2%29%284x%5E2+%2B+y%5E2%29\"
\n" ); document.write( "\"16x%5E4%2B+4+x%5E2%2Ay%5E2++-+4x%5E2%2Ay%5E2+-+y%5E4\"
\n" ); document.write( "\"16x%5E4+-+y%5E4\"->expression \"is\" equivalent to \"16x%5E4+-+y%5E4\"\r
\n" ); document.write( "\n" ); document.write( "b.\r
\n" ); document.write( "\n" ); document.write( "\"%282x%29%5E4+-+%28y%29%5E4\"
\n" ); document.write( "\"%282%5E4x%5E4%29+-+%28y%29%5E4\"
\n" ); document.write( "\"%2816x%5E4%29+-+%28y%29%5E4\"->expression \"is\" equivalent to \"16x%5E4+-+y%5E4\"\r
\n" ); document.write( "\n" ); document.write( "c.\r
\n" ); document.write( "\n" ); document.write( "\"4x%5E2%284x%5E2+-+y%5E2%29+%2B+y%5E2%284x%5E2+-+y%5E2%29\"
\n" ); document.write( "\"16x%5E4+-+4x%5E2%2Ay%5E2%2B+4x%5E2+%2Ay%5E2+-+y%5E4\"
\n" ); document.write( "\"16x%5E4+-+cross%284x%5E2%2Ay%5E2%29%2B+cross%284x%5E2+%2Ay%5E2%29+-+y%5E4\"
\n" ); document.write( "\"16x%5E4++-+y%5E4\"->expression \"is\" equivalent to \"16x%5E4+-+y%5E4\"\r
\n" ); document.write( "\n" ); document.write( "d.\r
\n" ); document.write( "\n" ); document.write( "\"%282x-y%29%288x%5E3+%2B+y%5E3%29\"
\n" ); document.write( "\"16x%5E4+-+8x%5E3%2A+y+%2B+2x%2A+y%5E3+-+y%5E4\"->expression \"is\" \"not\" equivalent to \"16x%5E4+-+y%5E4\"\r
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