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If $A= \begin {bmatrix} -1 & 0 \\ 0 & 2 \end {bmatrix}$ then $A^3-A^2$ is equal to :

\[\begin {array} {1 1} (a)\;2A & \quad (b)\;2l \\ (c)\;A & \quad (d)\;l \end {array}\]

1 Answer

(a) 2A
answered Feb 27, 2014 by meena.p
 

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