Final answer:
To factorize the expression completely, we use the difference of squares formula and simplify the expression to get 6x.
Step-by-step explanation:
The given expression is (2x+1)^2 -(x-1)^2. To factorize it completely, we can use the difference of squares formula, which states that (a^2 - b^2) = (a + b)(a - b). Applying this formula, we have:
(2x+1)^2 -(x-1)^2 = [(2x+1) + (x-1)][(2x+1) - (x-1)]
Simplifying further, we get:
(2x+1+x-1)(2x+1-x+1) = (3x)(2) = 6x.