x = [ - 3 �} �ã (9 + 20 ) ] / 2

x = [ - 3 �} �ã (29) ] / 2
x = [ - 3 �} 5.385 ] / 2
x = 1.193, x = - 4.193
here is the real one that was just a example

Those are the correct answers to your previous question, but your symbols are unreadable