Explanation: Before we begin, remember the following: (a - b)(a - b) = (a - b)² = a² - 2ab + b²
Now, for the given, we have: (x - 3)(x - 3) We can note that the two brackets are identical. Therefore, we will simply apply the above rule as follows: (x - 3)(x - 3) (x - 3)² = (x)² - 2(x)(3) + (3)² = x² - 6x + 9
