document.write( "Question 678397: find the value of x
\n" ); document.write( "(4x+12)(3x+40)=180 \n" ); document.write( "

Algebra.Com's Answer #421361 by ReadingBoosters(3246) $\"\"$ $\"About$

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FOIL
\n" ); document.write( "{4x)(3x) + 4x(40) + 12(3x) + 12(40) = 180
\n" ); document.write( " $\"12x%5E2+%2B+160x+%2B+36x+%2B+480+=+180\"$
\n" ); document.write( "Combine like terms
\n" ); document.write( " $\"12x%5E2+%2B+196x+%2B+480+-+180+=+0\"$
\n" ); document.write( " $\"12x%5E2+%2B+196x+%2B+300+=+0\"$
\n" ); document.write( "Divde the entire equation by 12
\n" ); document.write( " $\"x%5E2+%2B+49%2F3+%2B+25+=+0\"$
\n" ); document.write( "Quadtratic Formula
\n" ); document.write( "x = $\"%28-196+%2B-+sqrt%28196%5E2-4%2812%29%28300%29%29%29%2F2%2812%29\"$
\n" ); document.write( "x = $\"%28-196+%2B-+sqrt%2838416-14400%29%29%2F24\"$
\n" ); document.write( "x = $\"%28-196+%2B-+sqrt%2824016%29%29%2F24\"$
\n" ); document.write( "x = $\"%28-196+%2B-+sqrt%2816%2A1501%29%29%2F24\"$
\n" ); document.write( "x = $\"%28-196+%2B-+4sqrt%281501%29%29%2F24\"$
\n" ); document.write( "x = $\"%28-49cross%28-196%29%2B-+cross%284%29sqrt%281501%29%29%2F%286cross%2824%29%29\"$
\n" ); document.write( "...
\n" ); document.write( " $\"highlight_green%28x=%28-49%2Bsqrt%281501%29%29%2F6%29\"$
\n" ); document.write( "AND
\n" ); document.write( " $\"highlight_green%28x=%28-49-sqrt%281501%29%29%2F6%29\"$
\n" ); document.write( ".....................
\n" ); document.write( "Delighted to help.
\n" ); document.write( "-Reading Boosters
\n" ); document.write( "Website: www.MyHomeworkAnswers.com
\n" ); document.write( "Wanting for others what we want for ourselves. \n" ); document.write( "

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