document.write( "Question 1121286: For what value of k is 49x^2-36x+k a perfect square \n" ); document.write( "
Algebra.Com's Answer #737106 by Edwin McCravy(20059)\"\" \"About 
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document.write( "    (A+B)² = A²+2AB+B²\r\n" );
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document.write( "49x²-36x+k = A²+2AB+B²  \r\n" );
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document.write( "So we equate the corresponding terms\r\n" );
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document.write( "   A²=49x²,    2AB=-36x,     k=B² \r\n" );
document.write( "    A=7x  , \r\n" );
document.write( "            2(7x)B=-36x\r\n" );
document.write( "              14Bx=-36x\r\n" );
document.write( "               14B=-36\r\n" );
document.write( "                 B=-36/14\r\n" );
document.write( "                 B=-18/7\r\n" );
document.write( "                            k=(-18/7)²\r\n" );
document.write( "                            k=324/49\r\n" );
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document.write( "Edwin
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