exam Maths Puzzle Numerical Ability

A man has a square garden area with a sidewalk 2 feet wide all around it. If the area of the sidewalk plus garden is 196 square feet, what are the dimensions of the garden area?

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Could use some help with this problem. I have to simplify 1/x^2-36/1+6/x-6 Can you help? This take home exercise has me stumped:

Write the quadratic equation, given the solution: (3/5, 2/7)

Thank you.