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Question
Find the value of x given that A2 = B
A = `[(2, 12),(0 , 1)]` B = `[(4, x),(0, 1)]`
Solution
A = `[(2, 12),(0 , 1)]`
∴ A2 = `[(2 , 12),(0, 1)][(2, 12),(0,1)]`
= `[(4 , 36),(0, 1)]`
∵ A2 = B (given)
∴ `[(4, 36),(0, 1)] = [(4, x),(0, 1)]`
∴ x = 36.
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