exam Maths Puzzle Numerical Ability

Factoring General Quadratic Trinomial 2x2+x-3 Read 2xsquared plus X minus 3.

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exam Other Question

I dont know how to do this; Write an algebraic expression for: two thirds of the square of a number. Horriable at fractions any help would be greatly appreciated. It is a fraction with the exponet being the 2/3 and 1/3.

(25x^3) 2/3
(125xy^2) 1/3