Determine whether the given quadratic equation has root if so find the root 1/x+1+2/x+2=4/x+4, (x not eqaul -1,-2,-4)
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In order to meet quality requirements and minimise the number of waste workpieces, the checking andalignment of machine tools is essential. The most important thing to check is the geometry of the machine; not even a precisely calibrated linear motion can compensate for a crooked movement or uneven surface.
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