exam Maths Puzzle Numerical Ability

Simplify the rational expression:
(x^2 - 7x + 12)/(x^2 - 16)

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exam Other Question

2x^2-5x=3 The ratio of the number who were puissant to the number who were diffident was 2 to 5. If there were 2450 who were either puissant or diffident, now manu were puissnat?