Question

the square of every real number is positive

Answer 1

hiii
Yes, square of every real number is positive, where as that of complex numbers is not. Originally Answered: Is the square of every real number, positive? Zero is the only number, squaring which we get a neutral number again (Zero). For every other real number, positive or negative, the square is always positive.
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Answer 2

Answer:

The square of every real number except zero is positive; only the square of zero, we get neutral number zero again.

Step-by-step explanation:

There are 3 kinds of real number-

1. positive real number
2. Negative real number
3. Neutral real number

1. Positive real number when squared gives a positive real number.

E.g. (2)^2 = 4

       (4)^2 = 16

2. Negative real number when squared also gives positive real number because of the power being given.

E.g. (-2)^2 = 4

       (-3)^2 = 9

3. Neutral real number zero when squared gives zero only.

E.g. (0)^2 = 0

Thus except zero, the square of all the positive and negative real number is always positive.