Mario was given the problem, 4x^2-16, to factor completely.
He wrote (2x + 4)(2x-4). Is he correct?

A. No, Mario should have factored out GCF as well. The correct answer is 2(x + 2)(x - 2)

B. No, Mario should have factored out GCF as well. The correct answer is 4(x + 2)(x - 2)

B is correct

Step-by-step explanation:

= (2x+4)(2x-4) = 2(x+2)2(x-2) = 4(x+2)(x-2)

people went from manufacturing one object at a time by hand to manufacturing many objects in factories

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