<p>This is an ACT question, but I'm posting it here. Too bad.</p>
<p>55) If (x-7) is a factor of 2x^2 - 11x + k what is the value of 'k'?</p>
<p>The back of the book says "If (x-7) is a factor, then there would have to be another factor (2x+b).."</p>
<p>WHAT IS THIS '2X+B'??</p>
<p>Thanks :)</p>
<p>That would be the b in the quadratic formula: [The</a> Quadratic Formula Explained](<a href=“http://www.purplemath.com/modules/quadform.htm]The”>The Quadratic Formula Explained | Purplemath)</p>
<p>In this case, b is 11.</p>
<p>Thanks, but how did they get ‘2x+b’ from the formula??</p>
<p>Still a bit confused</p>
<p>^ only 2x * x = 2 *(x^2)</p>