If A=[\table 5a,-b;3,2] and A adj A=AA^T,then 5a+b is equal to [Main 2016]

Matrices and Determinants Part 1

Section: Mathematics

Question : 65 of 100

Marks: +1, -0

If A=[

5a	−b
3	2

] and A adj A=AAT,then 5a+b is equal to

[Main 2016]

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25a2+b2	15a−2b
15a−2b	13