Why does each perfect square have two square roots?

because the square root is limited in it's range to only positive values whereas the function flx 2 x^2 has a domain of both positive and negative values

Perfect squares don't have "two" square roots

Step-by-step explanation:

It's just 1 number that divides perfectly to get a perfect square.

For example, the sqr of 64 is 8. 64 doesn't have "two" square roots because 8 and 8 are the same thing.

It has one square root: therefore, it's a perfect square.

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

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step-by-step explanation: