উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
[ -3 8 ] [ 8 -5 ]
A² - 2I = [ -1 2 ] [ 3 -4 ] [ -1 2 ] [ 3 -4 ] - 2 [ 1 0 ] [ 0 1 ] = [ (-1-1) (-2-8) ] [ (-3-12) (6+16) ] - [ 2 0 ] [ 0 2 ] = [ 7 -10 ] [ -15 22 ] - [ 2 0 ] [ 0 2 ] = [ -3 8 ] [ 8 -5 ]