exam Maths Puzzle Numerical Ability

Simplify:

a) (3/4)^-2 +(2/5)^0 -(4/3)^2
b) (x^-1 + y^-2)^-2

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exam Other Question

How do you add ad sutract the polynomials 2a^2+3ab-5b^2 and b^2-ab? separate 72 into two parts, one of which shall be 1/3 of the other