document.write( "Question 318628: State the value of the discriminant: 10x^2+5x-5=0 \n" ); document.write( "
Algebra.Com's Answer #228082 by jim_thompson5910(35256)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "From \"10x%5E2%2B5x-5\" we can see that \"a=10\", \"b=5\", and \"c=-5\"\r
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\n" ); document.write( "\n" ); document.write( "\"D=b%5E2-4ac\" Start with the discriminant formula.\r
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\n" ); document.write( "\n" ); document.write( "\"D=%285%29%5E2-4%2810%29%28-5%29\" Plug in \"a=10\", \"b=5\", and \"c=-5\"\r
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\n" ); document.write( "\n" ); document.write( "\"D=25-4%2810%29%28-5%29\" Square \"5\" to get \"25\"\r
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\n" ); document.write( "\n" ); document.write( "\"D=25--200\" Multiply \"4%2810%29%28-5%29\" to get \"%2840%29%28-5%29=-200\"\r
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\n" ); document.write( "\n" ); document.write( "\"D=25%2B200\" Rewrite \"D=25--200\" as \"D=25%2B200\"\r
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\n" ); document.write( "\n" ); document.write( "\"D=225\" Add \"25\" to \"200\" to get \"225\"\r
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\n" ); document.write( "\n" ); document.write( "So the discriminant is \"D=225\"\r
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\n" ); document.write( "\n" ); document.write( "Since the discriminant is greater than zero, this means that there are two real solutions.
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