Сначала, упростим:
= 8x³ - 343 + 343 - 4 ⋅ (4x² - 1) =
8x³ - 16x² + 4 =
= 8 ⋅ 1³ - 16 ⋅ 1² + 4 = 8 - 16 + 4 = - 4
Сначала, упростим:
= 8x³ - 343 + 343 - 4 ⋅ (4x² - 1) =
8x³ - 16x² + 4 =
= 8 ⋅ 1³ - 16 ⋅ 1² + 4 = 8 - 16 + 4 = - 4