exam Maths Puzzle Numerical Ability

2 cubed-root(a^2) / (square-root of 8a)... Im Having trouble with this problem. -thx for your help

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exam Other Question

if tory averaged 52 mph on state highways and 62 mph on interstate highways on her 450 mile trip and her driving time was 7 hours and 45 minutes, how long did she travel on interstate hightway and how many miles did she travel on state highways? Please help me solve this equation. The problem states : factor completely 6x^5-21x^3+3x^2