Question

IF A = 7 8 6
1 3 9
−4 3 −1
B = 4 11 −3
−1 2 4
7 5 0
then Find 2A + B.

Answer 1

Answer:

2A+3B=[23−1245] …………(1)

A+2B=[510632] ………….(2)

2× Equation (2) - Equation (1)

⇒2A+4B−2A−3B=[10−22−30+112−26−44−5]

⇒B=[8−11102−1].