exam Maths Puzzle Numerical Ability

write in simplest form.

x^2 - 18x + 81 / x-9

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exam Other Question

1.what expressions are equivalent to the one below?
log^381+log^381
2.what expressions are equivalent to the one below?
log(10^5) the length of a rectangle is 3 more than the width. the area is 28. find the dimensions of the rectangle.