document.write( "Question 1172676: The quadratic equation x²+bx+9=0 has a unique solution if b= -6 or if b=___? \n" ); document.write( "

Algebra.Com's Answer #797768 by ikleyn(52784) $\"\"$ $\"About$

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document.write( ". . . or if b= 6    (due to the similar reason as for b= -6).\r\n" );
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