SOLUTION: To find b the equation b= c 2 − a 2 can be used but the value of c must be determined. Since c is the distance from the foci to the center, take either foci and determine the d

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: To find b the equation b= c 2 − a 2 can be used but the value of c must be determined. Since c is the distance from the foci to the center, take either foci and determine the d      Log On


   

Question 1189861: To find b the equation b= c 2 − a 2 can be used but the value of c must be determined. Since c is the
distance from the foci to the center, take either foci and determine the distance to the center. Then solve for b.
Foci (-3, 8): c=| 2−( −3 ) |=| 5 |=5
Foci (7, 8): c=| 2− 7 |=| −5 |=5
c = 5
b= c 2 − a 2
b= 5 2 − 3 2 = 16 =4
b = 4
Answer by ikleyn(52798) About Me  (Show Source):
You can put this solution on YOUR website!
.

What is written in this post,  is  CORRECT


( except of   b = c^2 - a^2   in the first line,  where should be   b = sqrt%28c%5E2+-+a%5E2%29,  instead )


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In the future,  write   a^2   if you want to denote the square of  "a".


Also,  if you submit such a post,  write somewhere at the beginning

        " check please whether my solution is correct "

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