give Me solution....
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Step-by-step explanation:
A=[2 4]
[ -1 k]
A^2=0
A^2=A.A= (2x2)+(-1x4) (4x2)+(kx-1)
(2x-1)+(-1xk) (4x4)+(kxk)
[0 0] =[4-4 8-k]
[0 0] [-2-k 16-k^2]
k=-4,-2,4,8 are the possible values.
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