Solve the following questions. Given , find BA and use this to solve the system of equations y + 2z = 7, x – y = 3, 2x + 3y + 4z = 17

Question

Philoid · Accepted Answer

B = A =

BA =

Now, we can see that it is BA = 6I. where I is the unit Matrix

Or, B ^{– 1} =

Now the given equation can be written as:

A X B

Or, X = B ^{– 1}A

=

X =

Hence, x = – 8,y = – 15 and z =