Question

-3
-6
and AX = B then find X.
(6) If A =
1 2 3
-1 1 2, B =
1 2 4
-9​

Answer 1

Step-by-step explanation:

Given, A=[−122−1] and B=[31]

∴A−1=−31[−1−2−2−1]=31[1221]

and AX=B

⇒X=A−1B

       =31[1221][31]

      =31[3+26+1]

      =31[57]