Question 97683
1/x^2 
3/4x
5/x^2 
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Add these sides to get the perimeter:
= (1/x^2) + (3/4x) + (5/x^2)

lcm = 4x^2

Rewrite each fraction with the lcm as its denominator:
= (4/lcm) + (3x/lcm) + (20/lcm)

Write the sum of the numerators over the lcm

= (4+3x+20)/lcm

Simplify

= (3x+24)/4x^2

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Cheers,
Stan H.