Q18Long answer
If A = −2 −1 −2 , find A–1. 0 −1 1 Using A –1 , solve the system of linear equations x – 2y = 10 , 2x – y – z = 8 , –2y + z = 7.
If A = −2 −1 −2 , find A–1. 0 −1 1 Using A –1 , solve the system of linear equations x – 2y = 10 , 2x – y – z = 8 , –2y + z = 7.