exam Maths Puzzle Numerical Ability

Divide
x^3+2x^2+x+12/(x+3)

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exam Other Question

the perimeter of a rectangle is 30 meters. If the length is 5 meters more than the width, then what is the length and the width of the rectangle. Make a picture.

Please show me how to solve this problem? thanks!
Please solve2/x - 1/5 =
Thank you