Question

I Must

Answer 1

Answer:

;

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

The simple short answer is because all real numbers are to be squared.

If any negative value is put into x^2, the value will become positive. That's because an even number of negatives are positive.

For example y = x * x

Let x = - 3

y = (-3)(-3)

y = 9 because there are an even number of negatives.

Notice that if break x^2 into x * x, you should see more clearly that each x is equal to - 3