Let x : R3 → R3
x(u, v) = (2(u - v) ,uv, 2(u+v)). Show that x is a proper patch

Your answer would be ahere is how: perimeter is how long all the sides are. in a rectangle, there are two sets of parallel sides. so, to find this, we would to the following.(15x2)+(4x2)30+838if you have questions ask! and mark me brainliest! i really wanna level up : 3

12+3b -1=-5-b -12-1+5=-b-3b -8=-4b