Question

In the given figure, DEM KNM
DM 5
$\frac{dm}{km} = \frac{5}{3 } \: and \: kn \: = 4.5$
find DE.​

Answer 1

Answer:

There is an argument that logically the squaring operation applies to the whole subterm so the {} are correct. However it makes the {} into a mathord which can affect spacing to adjacent terms and if the subterm is large (but \left \right are not used so the brackets are not stretched) then the superscript could float up and become visually detached. So on balance, I think it's better to use the )^2 form.

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