Question 889743
{{{highlight(2b)(b-3)=2b^2-6b}}}
{{{(2b^2+3b-6)-(2b^2-6b)=9b-6}}}
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{{{highlight(9)(b-3)=9b-27}}}
{{{(9b-6)-(9b-27)=21}}}
So then,
{{{(2b^2 + 3b -6) (b-3)=(2b+9)+21/(b-3)}}}