i have another question on this topic.
a rectangular building is to have an area of 1800 sq. meters. on each side of the building there must be a walkway of 5 meters and on each end a walkway of 10 meters. What is the dimensions of the smallest rectangular piece of land that can accommodate the building?
so, i tried
area = xy
1800 = (x-5)(x-10)
= x^2 - 15x +50
0 = x^2 - 15x - 1750
doesn't seem to be im doing correctly...
what should i do?