exam Maths Puzzle Numerical Ability

If the sides of a square are decreased by 3 cm, the area is decreased by 81 cm^2. What were the dimensions of the original square?

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slove algebraically log base 4 (x+41)- log base 4(2x-5)=2 To me, this looks like a question not to hard to solve, but yet I am stuck on it. It asks, in Parallelogram ABCD, M