exam
Maths Puzzle
Numerical Ability
Show that x-a-b is a factor of (x^3)-(a^3)-(b^3)-3ab(a+b), preferably using synthetic division.
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y varies jointly as a and b and inversely as the spuare root of c. y=48 when a=4, b=8, and c=36. Find y when a=2, b=7, and c=16.