book Maths Puzzle Numerical Ability

a^2-ab+9a-9b Divided by a+9

All I would like to know is how to do this problem. Thanks.

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book Other Question

Fixed operating costs at a ball bearing plant is $2000 per day. Each worker created $500 worth of ball bearings in a day, but costs the company $300 per day in wages and benefit. Could you please assist me with this problem:

(16x^2 + 8)(x-2)/(x-2)