need help with step 3

. (Hint: To simplify the computations, minimize the square of the distance. ) Stop 1 Let (x, y, z) be a point in the plane x - y + z = 5. Substituting z in terms of x and y, this point is given by (x, y, z) = x, v. 5 - 1 - 171 ) + 1 ) . Step 2 Let S be the square of the distance from (5, 0, 8) to (x, y, 8 - x + y). Find S by using the distance formula squared. 5 - (x - 5)2 + (1 -032+ -3 - X+y calcPad Operations Step 3 Functions X .. Find the partial derivatives of 5 with respect to x and y. Symbols Relations Sets X S Vectors = Trig Greek