book Maths Puzzle Numerical Ability

What is the perimeter formula of a kite figure?

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book Other Question

I am having trouble factoring the following problem {{{6x^3+13x^2+x-2}}}
I am also having trouble with how to solve {{{(36^(.75))^2}}}
Thank you so much in advance
Simplify the rational expression


(x-5/x^2+2x-3)-(x-1/x^2+6x+9