Question

3x (x – y – Z) + 3y (x – y + z) + 32 (x + y – z) from 3 (x + y) (x – y) + 3z (2y + z)
z) and 3y (2z + x + x2)​

Answer 1

Answer:

Given system of linear equations are 

2x+3y+3z=5

x−2y+z=−4

3x−y−2z=3.

Represent it in matrix form

⎣⎢⎢⎡2133−2−131−2⎦⎥⎥⎤⎣⎢⎢⎡xyz⎦⎥⎥⎤=⎣⎢⎢⎡5−43⎦⎥⎥⎤ which is in the form of AX=B

A=⎣⎢⎢⎡2133−2−131−2⎦⎥⎥⎤

∣A∣=10+15+15=40=0

∴ A−1 exists

To find adjoint of A

A11=5