The two tangents that can be drawn from the point (3,5) to the parabola y=x^2 have slopes?

-my steps

y'=2x

I know this is sad. But i just don't know what the question is asking i usually have all the tangent line questions down but this one is stumping me.

The line y=3x+k is tangent to the curve y=x^3 when k is equal to?

-my steps

y'=2x

2x=3x+k

this doesn't make any sense and i think i am doing it wrong.

All help is appreciated. Thanks