exam Maths Puzzle Numerical Ability

given: f(x)=x-3 and g(x)=x-2 find f*g(x)


Thanks

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exam Other Question

Hello,

I am trying to translate: The sum of two numbers is fifteen. One less than three times the smaller is equal to the larger. Find the two numbers. Thanks.
need some help factoring

8x8 - 20x6 - 12x4 - 20x3

not sure how low to break it down. thank you for your time David.