document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=536075>Question 536075</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Which values of b will make the expression x^2 + bx+400 a perfect square trinomial?<BR>\n" );
document.write( "a. -80,80 b.-40,40 c.-100,100 d.-20,20 <BR>\n" );
document.write( "my wrong choice was d. which is the answer...? thx! </SPAN>\n" );
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document.write( "a. -80,80 b.-40,40 c.-100,100 d.-20,20 \r<BR>\n" );
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document.write( "B. is the answer\r<BR>\n" );
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document.write( "x² + 40x + 400<BR>\n" );
document.write( "= (x + 20)(x + 20) {when factored}<BR>\n" );
document.write( "or (x - 20)(x - 20)<BR>\n" );
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