'In MATLAB, equ1 = [x1 2 * x2]', what I get is not what I want. Why X1_ bar,x2_ bar appear?

In MATLAB, equ1 = [x1 2 * x2]', what I get is not what I want. Why did you choose X1_ bar,x2_ bar

syms x1 x2    
equ1 = [x1 2 * x2]'>= 0

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Solution 1:[1]

I use the .' to Transpose is get what I want.

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