Question

упростите выражение (3-x)^2-(x+1)^2

Answer 1

9 - 6x + x² - x² - 2x - 1 = 8 - 8x = 8(1 - x)

Answer 2

(3 - x)² - (x + 1)² = 9 - 6x + x² - x² - 2x - 1 = 8 - 8x = 8(1 - x)