exam Maths Puzzle Numerical Ability

I am in need of help...I have to multiply this one....

Page 279
Number 30

(x+3)(x-6)

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exam Other Question

find log 1000 where log means log to the base of 10 Determine if F(x) = (1/3)x-3 and g(x)= 3x+9 are inverse functions by computing their comositions.