SOLUTION: For what value of E does the point (1, 2, -1) sit on the curved surface governed by S(x, y) = x^2 - 3y^2 + 4x - Ey + 6? a. -1 b. 0 c. 1 d. 3½

Algebra ->  Graphs -> SOLUTION: For what value of E does the point (1, 2, -1) sit on the curved surface governed by S(x, y) = x^2 - 3y^2 + 4x - Ey + 6? a. -1 b. 0 c. 1 d. 3½      Log On


   



Question 156054: For what value of E does the point (1, 2, -1) sit on the curved surface governed by S(x, y) = x^2 - 3y^2 + 4x - Ey + 6?
a. -1
b. 0
c. 1
d. 3½

Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
S%28x%2C+y%29+=+x%5E2+-+3y%5E2+%2B+4x+-+Ey+%2B+6
S%281%2C2%29=-1
then
1-12%2B4-2E%2B6=-1
-2E-1=-1
-2E=0
E=0 (option b)