Answer:
A. 2x - 1
Step-by-step explanation:
We want the price of each notebook, so we will get this equation.
(4x^2 + 2x + 1) / (8x^3 - 1) [ The " / " sign means I wrote as a fraction. ]
After that, we will use this method to factor ( 8x^3 - 1 ).
a^3 - b^3 = ( a - b )( a^2 + ab + b^2 )
1 can be wrote as 1^3 as we still get the same answer.
8^3 - 1^3 = ( 2x - 1 )( 4x^2 + 2x + 1)
So, we will get this.
(4x^2 + 2x + 1) / ( 2x - 1 )( 4x^2 + 2x + 1)
Now, we can cross out the ( 4x^2 + 2x + 1 ).
We will be left with 1 / ( 2x - 1 ).
Flip it and we will get ( 2x - 1 )
And that is the answer.
I hope it helps.
