Page 737 - Elementary_Linear_Algebra_with_Applications_Anton__9_edition

or, equivalently, (5)

But

so 5 becomes

or
This can be rewritten as
which is the equation of an ellipsoid.

Exercise Set 9.7

Click here for Just Ask!
Find the quadratic forms associated with the following quadratic equations.
1.

(a)
(b)
(c)
(d)
(e)
(f)