document.write( "Question 124354: solve the equation by completing the square. $\"c%5E2%2B4c-7=0\"$ . my answer was $\"%28-2%29%2B-sqrt%2811%29\"$ . am i correct? \n" ); document.write( "

Algebra.Com's Answer #91138 by Edwin McCravy(20055) $\"\"$ $\"About$

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solve the equation by completing the square. $\"c%5E2%2B4c-7=0\"$ . my answer was $\"%28-2%29%2B-sqrt%2811%29\"$ . am i correct?\r
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document.write( "That's what I got!\r\n" );
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document.write( "Do you have a TI graphing calulator?  If you have \r\n" );
document.write( "one you can check your own problems with it easily, \r\n" );
document.write( "like this:\r\n" );
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document.write( "On the main screen type either one of your two answers: \r\n" );
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document.write( "type -2+Ö(11) then press \r\n" );
document.write( "these keys: \r\n" );
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document.write( "STO\r\n" );
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document.write( "XTqn\r\n" );
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document.write( "ENTER\r\n" );
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document.write( "type X²+4X-7 then press:\r\n" );
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document.write( "ENTER\r\n" );
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document.write( "You get the right side of the original equation,\r\n" );
document.write( "which is 0, so the answer is correct.\r\n" );
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document.write( "Takes a while to get used to checking algebra with a \r\n" );
document.write( "graphical calculator, but you get fast at it.\r\n" );
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document.write( "Edwin

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