If my yard is 200 ft and I want to find the area of the yard, give me an quadratic equation to help me solve this.

You can't solve this... unless you mean your yard has an area of 200 ft^2 and that it's a rectangle or square, or another shape where you can find the area.

Assuming that it's a rectangle, the sides will be let's say... x and y.

Then, the area is denoted by xy and is:

xy = 200

And that's all we can get from the information you gave.

Thank you trying to get some homework done online and have to come up with my own quadratic equation