The roots of the equation
-1, -2
-1, 2
1, -2
1, 2
If ,then x is equal to
6
-6
0
If |A| ≠ 0, then that square matrix is called _________
Singular matrix
Identity matrix
Zero matrix
Non singular matrix
x y z ( 1 + 1/x + 1/ y + 1/z )
x y z
1 + 1/x + 1/ y + 1/z
1/x + 1/ y + 1/z
(AB)-1 = __________
A-1B-1
B-1A-1
B-1/A-1
(AB)T
1 + a2 + b2 + c2
1 - a2 + b2 + c2
1 + a2 + b2 - c2
1 + a2 -b2 + c2
1/ abc
abc
ab + bc + ca
|AB| = ________
|B||A|
|A||B|
[AB]T
1
2
3
a ( x + y + z )
abc + xyz + pqr
a ( x + y + z ) + b ( p + q + r ) + c
