document.write( "Question 451555: How do i solve \"If f(2)=0 and f(x)=3x^2+kx-4,find k\" i need help solving this step by step. \n" ); document.write( "
Algebra.Com's Answer #310492 by robertb(5830)\"\" \"About 
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\"f%282%29+=+3%2A2%5E2+%2B+k%2A2+-+4+=+0\"\r
\n" ); document.write( "\n" ); document.write( "==> \"12+%2B+2k+-+4+=+0\"\r
\n" ); document.write( "\n" ); document.write( "==> 2k + 8 = 0\r
\n" ); document.write( "\n" ); document.write( "==> 2k = -8\r
\n" ); document.write( "\n" ); document.write( "==> k = -4.
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