The following quadratic form\(W\left( X \right) = 10X_1^2 + 4X_2^2 + X_3^2 + 2{X_1}{X_2} - 2{X_2}{X_3} - 4{X_1}{X_3}\)

The following quadratic form\(W\left( X \right) = 10X_1^2 + 4X_2^2 + X

1.	The following quadratic form\(W\left( X \right) = 10X_1^2 + 4X_2^2 + X_3^2 + 2{X_1}{X_2} - 2{X_2}{X_3} - 4{X_1}{X_3}\)
A.	is positive definite
B.	is negative definite
C.	is negative semi-definite
D.	None of the above
Answer» B. is negative definite