## Step-by-step explanation

Problem to solve:

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$x^2-1\cdot 1^2$

Learn how to solve special products problems step by step online. Solve the product (x+1)(x-1). The sum of two terms multiplied by their difference is equal to the square of the first term minus the square of the second term. In other words: (a+b)(a-b)=a^2-b^2, where:<ul><li>The first term (a) is x.</li><li>The second term (b) is 1.</li></ul>Then:. Calculate the power 1^2. Multiply -1 times 1.