document.write( "Question 438304: I need to solve by factoring and using the principle of zero products.
\n" ); document.write( "question: 9x^2-4=0\r
\n" ); document.write( "\n" ); document.write( "I know 9 has a square root of 3 and 4 has a square root of 2 so should I use the steps of \"difference of squares\" or \"perfect square trinomial\" to factor? Oh wait is that even a trinomial equation?\r
\n" ); document.write( "\n" ); document.write( "I did this one but there are like terms so I know what the GCF is to pull out. The problem I need help with doesn't have like terms.
\n" ); document.write( "x^2+18x=0
\n" ); document.write( "x(x+18)=0
\n" ); document.write( "x=0 x=-18\r
\n" ); document.write( "\n" ); document.write( "Thank you for your time \n" ); document.write( "

Algebra.Com's Answer #303153 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi
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document.write( "solving by 'factoring' and using the principle of zero products
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document.write( "F	First terms
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document.write( "O	Outside terms
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document.write( "I	Inside terms
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document.write( "L	Last terms
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document.write( " 9x^2-4=0
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document.write( "factoring:   Note:SUM of the outside terms(-6x) and the inside terms(6x) = 0
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document.write( " (3x+2)(3x-2) = 0
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document.write( "using the principle of zero products
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document.write( " (3x+2)=0  
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document.write( "   3x = -2       x = -2/3
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document.write( " (3x-2)=0  
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document.write( "   3x = 2        x = 2/3
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