exam Maths Puzzle Numerical Ability

How do you completly factor 6y2 - 54, whats the answer?

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Please help me to solve this problem: 12-4k=-18+11k
Can you show me the steps to help me know how to do the problem. Two airplanes start from points that are 1020 miles apart. They travel toward each other at 300 m.p.h. When will they meet if one starts at 9am and the other at 10am?