document.write( "Question 339033: If k >0 and 25x^2 + bx + 16 = (5x - k)^2 , for all values of x, what is the value of k – b?\r
\n" ); document.write( "\n" ); document.write( "(a) -44 (b) -36 (c) 14 (d) 36 (e) 44
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Algebra.Com's Answer #243032 by galactus(183)\"\" \"About 
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Since the constant in the given quadratic is 16, then k must equal 4.\r
\n" ); document.write( "\n" ); document.write( "If k = 4, then we have (5x-4)^2=25x^2-40x+16 and b=-40\r
\n" ); document.write( "\n" ); document.write( "Thus, k-b=4-(-40)=44
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