document.write( "Question 329290: Use the discriminant to determine whether the quadratic equation below has one real number solution, two real number solutions, or two complex number solutions:\r
\n" ); document.write( "\n" ); document.write( "10z^2-z+7-0 \n" ); document.write( "

Algebra.Com's Answer #236087 by Fombitz(32388) $\"\"$ $\"About$

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$\"+D=b%5E2-4ac+\"$
\n" ); document.write( " $\"D=%28-1%29%5E2-4%2810%29%287%29\"$
\n" ); document.write( " $\"D=1-280\"$
\n" ); document.write( " $\"D=-279\"$
\n" ); document.write( "Since the discriminant is negative, the roots are complex.
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\n" ); document.write( "Graphical verification, the curve never crosses the x-axis, hence complex roots.
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\n" ); document.write( " $\"graph%28300%2C300%2C-10%2C10%2C-5%2C15%2C10x%5E2-x%2B7%29\"$
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