3. Find the product of the square of binomial by applying the general formula (a + b)2 = ax + 2ab + b2and (a - b)2 = aż – 2ab + b2 – x² - 8x + 16 + b. x3 + 2xy - 9y C. x4 + 6x2y +9y2 d. 16x2 - 72x + 81 4. Find the product of the square of binomial by applying the general formula​