Learn how to solve differential calculus problems step by step online. Expand the expression (x+3)(x-3)-(x-1)^2. 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.. A binomial squared (difference) is equal to the square of the first term, minus the double product of the first by the second, plus the square of the second term. In other words: (a-b)^2=a^2-2ab+b^2. Simplify the product -(x^2-2x+1). Simplify the product -(-2x+1).

Expand the expression (x+3)(x-3)-(x-1)^2