book Maths Puzzle Numerical Ability

how can i step by step factorize-
a(a-1)x^2 + x - a(a+1)

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book Other Question

Please help me solve this problem

the area of the rectangle at right is 24 square units ,draw and label all possible rectangleswith an area of 24 square units use only whole nu Could someone out there help me divide this problem?

3.2318 divided by 0.52

Thanks!
Sher