Tutor Could you help me please How do I find the LCD for 7 a 2 2a 63 8 a

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Mathematics is like checkers in being suitable for the young, not too difficult, amusing, and without peril to the state.

Plato

Mathematics is the art of giving the same name to different things.

Henri Poincare

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Latest exam Aptitude Question SOLUTION: Tutor: Could you help me please? How do I find the LCD for 7/a^2+2a-63, 8/a+9 I have no idea how to do this problem. I'm trying to follow the steps on the practice workshe