Розкрий дужки (x - 2)(x - 9)

Объяснение:

(х-2)(х-9)=х²-9х-2х+18=х²-11х+18

(x - 2)(x - 9) = x(x - 9) - 2(x - 9)

x(x - 9) = x^2 - 9x

-2(x - 9) = -2x + 18

x(x - 9) - 2(x - 9) = x^2 - 9x - (-2x + 18)

x^2 - 9x - (-2x + 18) = x^2 - 7x + 18

x^2 - 7x + 18