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Автор - Nikitaesaulof04

(2x+0,5)^2-(2x-0,5)^2 при х=-3,5

Ответ

Автор - svetazuna

(2x+0,5)² - (2x-0,5)² =

= (4х²+2х+0,25) - (4х²-2х+0,25) =

= 4х²+2х+0,25 - 4х²+2х-0,25 = 4х

при х = -3,5:

4 * (-3,5) = -14

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