if P=(-3,1) and Q=(x,4), find all numbers x such that the vector represented by PQ has lenght 5.

thank you

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- January 24th 2010, 12:40 PMalessandromangionefind all numbers x
if P=(-3,1) and Q=(x,4), find all numbers x such that the vector represented by PQ has lenght 5.

thank you - January 24th 2010, 12:49 PMJhevon
- January 24th 2010, 01:18 PMalessandromangione
PQ must be like the resultant of a triangle formed by Q and P right?

I tried to find the vector of P and the 5 ( PQ) divided by the vector P...then this result divided by 4.... - January 24th 2010, 01:51 PMJhevon