Question 1091550
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<pre>
If two vectors are non-parallel and after multiplication by scalars they become equal,
it may happen in only one case:  if the scalar multipliers both are equal to 0 (ZERO).


So, 2p-1 = 0, which implies p = {{{1/2}}},

and q+2 = 0, which implies q = -2.
</pre>

Solved.