exam Maths Puzzle Numerical Ability

I am having a problem with evaluating the second part of this problem.
3^3-x^2+3x-4forx=3

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exam Other Question

Science and medicine. Ariana took 2 h longer to drive 360 mi on the first day of a trip than she took to drive 270 mi on the second day. If her speed was the same on both days, what was the driving time each day? Problem #1
Which of the ordered pairs (3,1),(0,-4),(-4,0),(-3,-7) are the solutions for the equations for the equation x-y=4?

answer is within these:
(a) (0,-4) ,(-4,0),and