book Maths Puzzle Numerical Ability

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square root of (5x^2-9)=2x

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book Other Question

Perform the indicated operation; express answer in factored form:
(x + 5)2 � x2 + 6x + 8
2x2 � x � 6 x + 5 The volume of a cube is given by V=s�. Find the length of a side of a cube if the Volume is 729 cm�.