Question

спростити вираз (9y-2)(9y+2)-18y

Answer 1

$(9y-2)(9y+2)-18y=81y^2-4-18y=81y^2-18y-4$

Answer 2

(9y - 2)(9y + 2) - 18y = 81y² - 4 - 18y = 81y² - 18y - 4