SOLUTION: Matrices A and B are multiplicative inverses. Find X > 2 , x < > 1 , 2 < > 2 , -3 < > -1 , 2 < Thank you.

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Question 321942: Matrices A and B are multiplicative inverses. Find X
> 2 , x <
> 1 , 2 <

> 2 , -3 <
> -1 , 2 <
Thank you.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
[A]=%28matrix%282%2C2%2C2%2Cx%2C1%2C2%29%29
[B]=%28matrix%282%2C2%2C2%2C-3%2C-1%2C2%29%29
[A][B]=[I]
Look at the first element.
2%282%29%2Bx%28-1%29=1
4-x=1
highlight%28x=3%29