document.write( "Question 611586: I thought I was getting the hang of this but definitely not sure now-
\n" ); document.write( "x^2-16x+4=0. Please show your work PLEASE! I need the value of the discriminate, give the number and the number of roots/solutions/zeros. I thought that I was to ad x^2+16+4 but I am so confused that I don't even know any more.\r
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Algebra.Com's Answer #385047 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "The discriminant is the part of the quadratic formula under the\r\n" );
document.write( "square root, b²-4ac.  \r\n" );
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document.write( "If it's positive, there are two real solutions\r\n" );
document.write( "If it's zero, there is 1 real solution\r\n" );
document.write( "If it's negative, there are no real solutions \r\n" );
document.write( "(but there are two imaginary solutions)\r\n" );
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document.write( "x² - 16x + 4 = 0\r\n" );
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document.write( "Always first compare an equation like this to this:\r\n" );
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document.write( "ax² + bx + c = 0\r\n" );
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document.write( "There is an understood 1 before th x², so think of your equation as\r\n" );
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document.write( "1x² - 16x + 4 = 0\r\n" );
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document.write( "Then a = 1, b = -16 and c = 4\r\n" );
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document.write( "The formula for the discriminant is \r\n" );
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document.write( "D = b² - 4ac\r\n" );
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document.write( "Substitute in the discriminant formula:\r\n" );
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document.write( "D = (-16)² - 4(1)(4)\r\n" );
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document.write( "D = 256 - 16\r\n" );
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document.write( "D = 240.  That's positive so there are two real solutions.\r\n" );
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document.write( "Edwin
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