Factor And Evaluate Polynomial Expression X²-1: Simplify And Solve With Ease

x²-1

(x+1)(x-1)

The expression x²-1 is a polynomial expression with one variable, x. It can also be written as (x-1)(x+1) using the difference of squares formula.

If asked to factor completely, we would write:

x²-1 = (x-1)(x+1)

If asked to evaluate the expression at a certain value of x, we would substitute that value in for x and simplify:

For example, if we were asked to evaluate x²-1 when x=3, we would write:

3²-1 = 9-1 = 8

Therefore, when x=3, the value of x²-1 is 8.

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