SOLUTION: The formula for the surface area of a cube is SA=6e^2. If the surface area of this cube is 6x^2-24x+24, what is the measure of one edge? a) x-2 b) x-4 c) x+2 d) x-6 I alre

Question 831068: The formula for the surface area of a cube is SA=6e^2. If the surface area of this cube is 6x^2-24x+24, what is the measure of one edge?
a) x-2
b) x-4
c) x+2
d) x-6
I already know the answer to this question is a). I just want to know WHY it is a). How do you figure out this question?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
6x^2-24x+24
6e2=6x^2-24x+24
/6
e^2=x^2-4x+4
e^2= (x-2)^2
taking positive roots
e=(x-2)
which is the side
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