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

16x(5th power) yz(9th power)
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-28x(7th power)y(5th power) 2(3rd power) what is the simplest form of (x^-2y^-3)over (x^2y^-1)^3