Question #79d54

1 Answer
Gió
Dec 19, 2015

I found #k=-7 and k=29#

Explanation:

Have a look:
enter image source here
Where the first equation is represented by the blue line while the other two (with 2 #ks#) are the parallel ones. All of them are equidistant from the point in the graph of coordinates #(-1/2,-2)# (even if the different scale of the two axes makes it difficult to spot).

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