i) Find the Image and Kernel of A = (2,1)(-4,-2) (where each bracket is a row).
ii) Calculate A2 and use i) to explain your result.
The Attempt at a Solution
So I can do everything up to the very last bit (i think anyway).
i) The Kernel = (1,-2) = Image.
ii) A2 = 0 but this is where I don't know what to say. How do I use part i) to explain the 0 matrix found?