book Maths Puzzle Numerical Ability

Simplifying renaming a factor equal to 1
a^2+5a+6/a^2-9

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can you help me solve (x+2)(x-3)=(x-3)^2 A skier rides a ski lift up a hill at 6km/hr. She skis back down parallel to the ski lift at 34km/hr. Round trip takes 30 minutes. How long far did she ski and for how long?