Предмет: Математика, автор: denispriluckij064

(х-7)(3х-2)-(5х+1)(2х-4)​

Ответы

Автор ответа: victoria200785
1

Ответ:

(x - 7)(3x - 2) - (5x + 1)(2x - 4) = {3x}^{2} - 2x - 21x + 14 - ( {10x}^{2} - 20x + 2x - 4) = {3x}^{2} - 2x - 21x + 14 - ( {10x}^{2} - 18x - 4) = {3x}^{2} - 2x - 21x + 14 - {10x}^{2} + 18x + 4 = { - 7x}^{2} - 5x + 18

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