document.write( "Question 970265: 3x^2+40x-128=0 \n" ); document.write( "

Algebra.Com's Answer #592911 by MathLover1(20849) $\"\"$ $\"About$

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\n" ); document.write( " $\"3x%5E2%2B40x-128=0\"$ ....write $\"40x\"$ as $\"-8x%2B48x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"3x%5E2-8x%2B48x-128=0\"$ ...group\r
\n" ); document.write( "\n" ); document.write( " $\"%283x%5E2-8x%29%2B%2848x-128%29=0\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x%283x-8%29%2B16%283x-8%29=0\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%28x%2B16%29%283x-8%29+=+0\"$ \r
\n" ); document.write( "\n" ); document.write( "solutions:\r
\n" ); document.write( "\n" ); document.write( "if $\"%28x%2B16%29+=+0\"$ , then $\"x=-16\"$
\n" ); document.write( "if $\"%283x-8%29+=+0\"$ , then $\"x=8%2F3\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"+graph%28+600%2C+600%2C+-20%2C+20%2C+-130%2C+20%2C3x%5E2-8x%2B48x-128%29+\"$ \r
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