The problem
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How is it -3
Answer provided by our tutors
You have typed in:
y = 2(-1) - 1
'2' multiplied by '(-1)' equals '-2'
'-2 - 1' equals '-3'
Or in short:
2*(-1) - 1 = - 2 - 1 = - 3
That is why you get:
y = -3