Pls help pls pls pls pls pls pls pls pls pls i will mark brainlinest pls

The area of the original plot is 200 x 300 = 60000  problem says  (x + 200)(x + 300) = 120000  x^2 + 500x + 60000 = 120000  x^2 + 500x - 60000 = 0  (x + 600)(x - 100) = 0, so  x = - 600 (reject), x = 100  x = 100 meters  300 x 400 = 120000hope this ! god bless-vf