book Maths Puzzle Numerical Ability

I was wondering if you could help me find the vertices, foci, and center of this conic section equation: 9x^2+25y^2-54x+50y-119=0
Thank you very much.

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book Other Question

Subtract 2x-3x^2+5x^3 from 5x^3+4x-x^2

Thank you.
How do I round to the indicated decimal place.

63.7937 thousandths

Thanks!