If 5A-2B={:[(11,2,-5),(4,-3,6)]:}and-2A+...

If `5A-2B={:[(11,2,-5),(4,-3,6)]:}and-2A+B={:[(4,-2,4),(-5,3,1)]:}`, then A =

`{:[(-19,2,3),(-6,3,8)]:}`

`{:[(19,-2,3),(-6,3,8)]:}`

`{:[(19,2,3),(6,3,8)]:}`

None of these

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The correct Answer is:

(i) A=(5A-2B)+2(-2A+B).
(ii) Multiply -2A+B with 2.
(iii) Add (5A-2B) and (-4A+2B) to obtain A.

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