What is 6(x-3) -4 (x-5)

2x + 2

Step-by-step explanation:

6(x - 3) - 4(x - 5)

6*x - 6*3 - 4*x - 4 * -5

6x - 18 - 4x + 20

2x + 2

2x+2

Step-by-step explanation:

6(x-3)-4(x-5)

distribute the 6 and 4

6x-18-4x+20

add all like terms

2x+2

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

step-by-step explanation: