2 ( t + 2 )² - ( -t - 2 )² + ( 2 - t ) ( t + 2 ) при t = -1/6 :
2 ( t² + 4t + 4 ) - (t² + 4t + 4 ) + ( 2t + 4 - t² - 2t ) = 2t² + 8t + 8 - t² - 4t - 4 + 2t + 4 - t² - 2t = 4t + 8 = 4 × (-1/6) + 8 = (-⅔) + 8 =
Ответ : 7⅓.
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