document.write( "Question 953637: Solve each polynomial equation by factoring:
\n" ); document.write( "1. 4x^5 - 8x^3 + 4x = 0
\n" ); document.write( "2. x^4 - 12x^2 = -36
\n" ); document.write( "3. 4x^3 + 7x^2 - 5x = 6
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Algebra.Com's Answer #582422 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
1. \r
\n" ); document.write( "\n" ); document.write( "\"4x%5E5+-8x%5E3+%2B+4x+=+0\"\r
\n" ); document.write( "\n" ); document.write( "\"4x%28x%5E4+-2x%5E2+%2B+1%29+=+0\"\r
\n" ); document.write( "\n" ); document.write( "\"4x%28x%5E2+-+1%29%5E2+=+0\"\r
\n" ); document.write( "\n" ); document.write( "\"4x%28x%5E2+-+1%29%28x%5E2+-+1%29+=+0\"\r
\n" ); document.write( "\n" ); document.write( "\"4x%28x+-+1%29%28x%2B1%29%28x+-+1%29%28x%2B1%29+=+0\"\r
\n" ); document.write( "\n" ); document.write( "solutions:\r
\n" ); document.write( "\n" ); document.write( "if \"4x+=+0\"=>\"x=0\"
\n" ); document.write( "if\"%28x+-+1%29+=+0\"=>\"x=1\"...double solution since we have factor \"x-1\" twice
\n" ); document.write( "\"%28x%2B1%29+=+0\"=>\"x=-1\"...double solution since we have factor \"x%2B1\" twice\r
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\n" ); document.write( "\n" ); document.write( "\"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C4x%5E5+-8x%5E3+%2B+4x%29+\"\r
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\n" ); document.write( "\n" ); document.write( "2. \r
\n" ); document.write( "\n" ); document.write( "\"x%5E4+-12x%5E2+=+-36\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E4+-12x%5E2+%2B36=0\".............recall the rule \"%28a-b%29%5E2=a%5E2-2ab%2Bb%5E2\"; in your case \"a=1\" and \"2ab=12\"=> \"b=6\"
\n" ); document.write( "now write it as a square of difference\r
\n" ); document.write( "\n" ); document.write( "\"%28x%5E2+-6%29%5E2=0\"\r
\n" ); document.write( "\n" ); document.write( "\"%28x%5E2+-6%29%28x%5E2+-6%29=0\"...since factors are same, you will have two pairs of double roots\r
\n" ); document.write( "\n" ); document.write( "if \"%28x%5E2+-6%29=0\"=>\"x%5E2=6\"=>\"x=sqrt%286%29\" or \"x=-+sqrt%286%29\" exact solution\r
\n" ); document.write( "\n" ); document.write( "=>\"x=2.5\" or \"x=-+2.5\" approximate\r
\n" ); document.write( "\n" ); document.write( "\"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+50%2C%28x%5E2+-6%29%28x%5E2+-6%29%29+\"\r
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\n" ); document.write( "\n" ); document.write( "3. \r
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\n" ); document.write( "\n" ); document.write( "\"4x%5E3+%2B+7x%5E2+-5x+=+6\"\r
\n" ); document.write( "\n" ); document.write( "\"4x%5E3+%2B+7x%5E2+-5x+-6=0\"\r
\n" ); document.write( "\n" ); document.write( "\"4x%5E3-x%5E2%2B8x%5E2-2x-3x-6=0\"\r
\n" ); document.write( "\n" ); document.write( "\"%284x%5E3%2B8x%5E2%29-%28x%5E2%2B2x%29-%283x%2B6%29=0\"\r
\n" ); document.write( "\n" ); document.write( "\"4x%5E2%28x%2B2%29-x%28x%2B2%29-3%28x%2B2%29=0\"\r
\n" ); document.write( "\n" ); document.write( "\"%284x%5E2-x-3%29%28x%2B2%29=0\"\r
\n" ); document.write( "\n" ); document.write( "\"%28%284x%5E2-4x%29%2B%283x-3%29%29%28x%2B2%29=0\"\r
\n" ); document.write( "\n" ); document.write( "\"%284x%28x-1%29%2B3%28x-1%29%29%28x%2B2%29=0\"\r
\n" ); document.write( "\n" ); document.write( "\"%284x%2B3%29%28x-1%29%28x%2B2%29=0\"\r
\n" ); document.write( "\n" ); document.write( "solutions:\r
\n" ); document.write( "\n" ); document.write( "if \"4x%2B3=0\"=>\"4x=-3\"=>\"x=-3%2F4\"\r
\n" ); document.write( "\n" ); document.write( "if \"%28x-1%29=0\"=>\"x=1\"\r
\n" ); document.write( "\n" ); document.write( "\"%28x%2B2%29=0\"=>\"x=-2\"\r
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\n" ); document.write( "\n" ); document.write( "\"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C4x%5E3+%2B+7x%5E2+-5x+-6%29+\"\r
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