book Maths Puzzle Numerical Ability

How do you factor this?

y/y+2 - 1/Y^2+2y

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book Other Question

I need some clarification on the zero-factor theorem.

I am to solve using the zero-factor theorem the following equation:

1. g^2-3g-18=0 I tried setiing up as g^2-3=0 and -18=0 this did not make sense to me.

and 2. 16d^2=4 An auto service center has ten fifty-five gallon drums of 90% ethylene glycol, a common antifreeze fluid used in car radiators. The service center also has eight fifty-five gallon