exam Maths Puzzle Numerical Ability

this one has varibles and divison again

x^2-16/x^2-8X+16

i started by breaking it down so dar ive got

(x-4)(x+4)/(x-4)(x-4)

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exam Other Question
(1+r)^3=1.560896
Solve for r. How would you write an equation for a line going through points (3,2) and (-2,4).