exam Maths Puzzle Numerical Ability

Find all the numbers for which the rational expression below is not defined:
x^2-16 / x^2 - 3x+12

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exam Other Question

You have an account with a starting value of $2000. A $100 deposit will be made into this account monthly for 24 years. This account pays an average interest rate of 3% per year. H Which one of the following is not a factor of the expression

(p+ q + r) ^3 - p^3 - q^3- r^3

1) p+q 2) q+p c) p+r d) p+q+r