November 2019 1 55 Report
1) Se a =  \left[\begin{array}{ccc}2&1\\-3&4\end{array}\right] , b =  \left[\begin{array}{ccc}21&7\\-3&1\end{array}\right] , c =  \left[\begin{array}{ccc}-1&-2\\5&3\end{array}\right] , entao o valor de A = a² + b - c² é:

a)212

b)114

c)50

d)0

e)46


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