document.write( "Question 93374: Try to find a quadratic equation with the roots 2 and 4? \n" ); document.write( "

Algebra.Com's Answer #67993 by Nate(3500) $\"\"$ $\"About$

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f(x) = (x - r)(x - l)
\n" ); document.write( "where r and l are roots
\n" ); document.write( "Proof:
\n" ); document.write( "Roots are: (r,0) and (l,0)
\n" ); document.write( "0 = (r - r)(r - l) = (0)(r - l) = 0
\n" ); document.write( "0 = (l - r)(l - l) = (l - r)(0) = 0
\n" ); document.write( "roots: r = 2 and l = 4
\n" ); document.write( "f(x) = (x - 2)(x - 4) = x^2 - 6x + 8
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