exam Maths Puzzle Numerical Ability

18X/(X^2+10X+16) = 3/(X+2) -3/(X+8)

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exam Other Question

I have tried these several times and still get the wrong answer - HELP!!

g^2+5g+4/5g+5/g^2+8g+16/g^2+g-12
(hope I wrote this correctly - need to solve /simplify
(x+1) divided by x^2+2x+1/x^2+13x+12 - HELP
Thanks alot!!!! Geometry. The length of a rectangle is 1cm longer than its width. If the diagonal of the rectangle is 4 cm, what are the dimensions (then length and the width) of the rectangle?