Я не NNNNLLL54 , но я помогу :))
3 - (2,8x² - 4x + 3) + (5,2 - 1,4x) = 3 - 2,8x² + 4x - 3 + 5,2 - 1,4x =
= - 2,8x² + 2,6x + 5,2
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Я не NNNNLLL54 , но я помогу :))
3 - (2,8x² - 4x + 3) + (5,2 - 1,4x) = 3 - 2,8x² + 4x - 3 + 5,2 - 1,4x =
= - 2,8x² + 2,6x + 5,2