how to factor w^2r^2-1
To factor the expression w^2r^2 - 1, we can notice that it is in the form of a difference of squares. The difference of squares formula states that:
a^2 - b^2 = (a + b)(a - b)
In our case, a = w^2r^2, and b = 1. Applying the formula, we can write the expression as:
w^2r^2 - 1 = (w^2r + 1)(w^2r - 1)
So, the factored form of w^2r^2 - 1 is (w^2r + 1)(w^2r - 1).