book
Maths Puzzle
Numerical Ability
What is the sum and product of the roots of 15x^2 - 30x + 13 = 0?
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book Other Question
an airplane took 2 hours to fly 600km against a head wind. the return trip with the wind took 1 2/3 hours. find the speed of the plain in still air.
Simplify by rationalizing the denominator:
(/11-/5)
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(/11+5)