exam Maths Puzzle Numerical Ability

2x^2-3=15

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exam Other Question

Subtract. Simplify by collecting like radical terms if possible.

root ( 8, 50 ) - root ( 5, 2)
An airplane flies 1,000 due east in 2 hours and 1,000 due south in 3 hours. What is the average speed of the airplane?
This is what I did:

((1,000/2)+(1,000/3))/2