Answer:

Step-by-step explanation:

we have

we know that
The volume of a cube is equal to

where
b is the length side of a cube
Using a graph tool------> find the roots of the polynomial
see the attached figure
x=4
so

therefore
<u>The answer is</u>
the length side of a cube is equal to (x-4)
X^2-5x, given x=7,
(7)^2-5(7)=14
sqrt(14)=3.74