The difference of three times a number and six is twice the number
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In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Find the missing dimension extra points

Alistair has 5 half-pounds chocalate bars. it takes 1 1/2 pounds of chocalate,broken into chunks, to make a batch of cookies. how many batches can alistair mke with chocalate he has on his hand?