(7 - x)² + (x - 4)(x + 4) = 7² - 2 * 7 * x + x² + x² - 4² = 49 - 14x + x² + x² - 16 =
= 2x² - 14x + 33
(7 - x)² + (x - 4)(x + 4) = 7² - 2 * 7 * x + x² + x² - 4² = 49 - 14x + x² + x² - 16 =
= 2x² - 14x + 33