document.write( "Question 171478: 1. (-7x2 + 5xy - 2y2) + (3x2 - 5xy - 4y2) \n" ); document.write( "

Algebra.Com's Answer #126774 by midwood_trail(310) $\"\"$ $\"About$

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(-7x^2 + 5xy - 2y^2) + (3x^2 - 5xy - 4y^2)\r
\n" ); document.write( "\n" ); document.write( "We are adding two polynomials here.\r
\n" ); document.write( "\n" ); document.write( "We combine like terms all the way through.\r
\n" ); document.write( "\n" ); document.write( "-7x^2 + 3x^2 + 5xy - 5xy - 2y^2 - 4y^2\r
\n" ); document.write( "\n" ); document.write( "Notice that I placed all like terms together.\r
\n" ); document.write( "\n" ); document.write( "Simplify part by part.\r
\n" ); document.write( "\n" ); document.write( "-7x^2 + 3x^2 = -4x^2\r
\n" ); document.write( "\n" ); document.write( "5xy - 5xy = 0\r
\n" ); document.write( "\n" ); document.write( "- 2y^2 - 4y^2 = -6y^2\r
\n" ); document.write( "\n" ); document.write( "We put it all together and get -4x^2 - 6y^2\r
\n" ); document.write( "\n" ); document.write( "Of course, we can factor -4x^2 - 6y^2.\r
\n" ); document.write( "\n" ); document.write( "I'll let you that.\r
\n" ); document.write( "\n" ); document.write( "If cannot, then write back.\r
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