QUESTION 1
Taking the right hand side we have;

We can rewrite this as;

We apply difference of two squares.



QUESTION 2
Taking the right hand side we have;

We can rewrite this as;

We apply difference of two squares.



QUESTION 3
Taking the right hand side of the given equation, we have;
We rewrite this as;
QUESTION 4
From the RHS;

This implies that;


QUESTION 5
From the left hand side, we have

This implies that;

Using difference of two squares, we have;

QUESTION 6
From the LHS;

We rewrite to obtain;

Using difference of two squares, we obtain;
