document.write( "Question 574282: prove that the roots of the quadratic equation are real when the discriminant is real. \n" ); document.write( "

Algebra.Com's Answer #369048 by richard1234(7193) $\"\"$ $\"About$

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If the discriminant is defined as b^2 - 4ac, then you cannot prove it (because it could be negative and you would have non-real roots). If it is defined as sqrt(b^2 - 4ac), then it would be a true statement because the roots of the quadratic would be fractions where both numerator and denominator are real. \n" ); document.write( "

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