Answer
$(x-1)^{3/2}(x-2)(x)$
Work Step by Step
$(x-1)^{7/2}-(x-1)^{3/2}=(x-1)^{3/2}[(x-1)^{2}-1]=(x-1)^{3/2}[(x-1)-1][(x-1)+1]=(x-1)^{3/2}(x-2)(x)$
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