exam Maths Puzzle Numerical Ability

Solve by factoring: 4x^2 - 1 = 0

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exam Other Question

simplify

-3^0(3^-2)

DIVIDED BY

9 ^-3/2 Find the perimeter of a triangle if the three sides are:

square root 5 - square root 3
square root 5 + square root 3
4

thanks,