Asked by Anony
According to my calculator, -2^2 is equal to -4, I did this to another calculator, and google, but got the same answer.
But, isn't
-2^2
= -2*-2
= 4 according to negative multiplied by negative = positive?
So which one should I follow?
But, isn't
-2^2
= -2*-2
= 4 according to negative multiplied by negative = positive?
So which one should I follow?
Answers
Answered by
Reiny
Your calculator is programmed to follow the order of operation.
Since exponents are to be done first, it is doing
-1(2^2)
= -1(4)
= -4
Brackets on your calculator allow you to change BEDMAS
trying entering it as
(-2)^2 and you will get +4
Suppose you were to calculate
5 - 2^2, I am sure you would get 5 - 4 = 1
that is, you would do the power first , then do the subtraction
What the calculator does in effect is
0 - 2^2
Since exponents are to be done first, it is doing
-1(2^2)
= -1(4)
= -4
Brackets on your calculator allow you to change BEDMAS
trying entering it as
(-2)^2 and you will get +4
Suppose you were to calculate
5 - 2^2, I am sure you would get 5 - 4 = 1
that is, you would do the power first , then do the subtraction
What the calculator does in effect is
0 - 2^2
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