Idont get these plz awnser fast and quickly keep it simple

the answer to the question would be "b"

"a" would be incorrect because you can turn it into a fraction.

"b" would be incorrect because it forms a perfect square.

"c" would also be incorrect because it forms a perfect a square. 4 x 4 = 16

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

12/11c

or

12

c

11