Question

( begin{aligned} rightarrow A &left[begin{array}{cc}3 & 1 -1 & 2end{array}right] A^{2} &=left[begin{array}{cc}3 & 1 -1 & 2end{array}right]left[begin{array}{cc}3 & 1 -1 & 2end{array}right] & geqslantleft[begin{array}{cc}8 & 5 -5 & 3end{array}right] end{aligned} )

# 13 17 ION-2 If A= then A=

Solution