<PRE><B>Question 243164</B>
3x^2-6x+k
Let k=0
3x^2-6x
3x(x-2)
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Let k=3
3x^2-6x+3
(3x-3)(x-1)
3(x-3)(x-1)
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Let k=-9
3x^2-6x-9
(3x+3)(x-3)
3(x+3)(x-3)</PRE>