document.write( "Question 982938: One solution of $\"+kx%5E2%2B3x-k=0+\"$ is -2. Find the other solution using quadratic formula (or using other ways) \n" ); document.write( "

Algebra.Com's Answer #603737 by rothauserc(4718) $\"\"$ $\"About$

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for x = -2, we have
\n" ); document.write( "k*(-2)^2 + 3*(-2) - k = 0
\n" ); document.write( "4k -6 - k = 0
\n" ); document.write( "3k = 6
\n" ); document.write( "k = 2, therefore
\n" ); document.write( "2x^2 +3x -2 = 0
\n" ); document.write( "x = (-3 + square root(9 - 4*(2)*(-2))) / 4 = 0.5
\n" ); document.write( "x = (-3 - square root(9 - 4*(2)*(-2))) / 4 = -2
\n" ); document.write( "therefore,
\n" ); document.write( "the solutions for x are x = -2, x = 0.5
\n" ); document.write( " \n" ); document.write( "

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