Basic Maths Grand Test - Q3

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$If $A = \begin{bmatrix} \alpha & \beta \\ \gamma & -\alpha \end{bmatrix}$$ And it is given A^2 = I, then

 

A. 1 + \alpha ^ 2 + \beta \gamma = 0

B. 1 - \alpha ^ 2 + \beta \gamma = 0

C. 1 - \alpha ^ 2 - \beta \gamma = 0

D. 1 + \alpha ^ 2 - \beta \gamma = 0

asked Nov 17, 2019 in Basic Maths by gbmentor (90,880 points)
reshown Nov 20, 2019 by getgatebook

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