Verified answer

Both (-x) and (x) transform to (x)^2 when squared, that's why.

thats a algebra question to me but ok. Well the reason behind that is that two number can make y^2=x true and that is having a square root of x being positive or negative. Math gets soooo much easier if you plug in numbers (correctly).

Does this help?

if y ²= x is true, then:

√x = ±y (because when you take the square root of both sides, the answer could be either positive or negative)

So essentially you have √x = ±y

which could be written as two separate equations

√x = y and...

√x = -y (which is the same thing as -√x = y, if you multiply each side by -1)

y = sqrt(x) or y = -sqrt(x), where x>0 i.e posite number

So (y)^2 = x where y is a real positive number