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What non-zero integer must be placed in the square so that the simplified product of these two binomials is a binomial: $(3x+2)(18x-\Box )$?

 Jul 29, 2021
 #1
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I noted that if there's a 12 in the box, then the expanded product would contain a +36x and a –36x.  

 Jul 29, 2021

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