exam Maths Puzzle Numerical Ability

Solve for x: x - (6/x) = 1

a) 2
b) -3
c) 3, -2
d) 2, -3
e) none of these

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exam Other Question

When simplifying a radical, is it necessary to take the absolute value of a result to indicate the principal root? B is between A and D. C is between A and D. AB + BD= AD. AC+CD=AD AD+AC+CD. AB=BD=AC+CD. Complete the proof