Question: Maple problem with A^2+3*A+Delta*I = 0;

Hello! Anybody can help my to have this problem?

 


A^2+3*A+Delta*I = 0;

 A = RTABLE(145776372,MATRIX([[a, 2], [1, b]]),Matrix)

I want calculate 'a' and 'b' whit 'x' and 'y', and it's my code:

 

++++++++++++++++

But this is wrong, but I dont know...

Thank you!!!!

(sorry for my English)

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