18. Упростите выражения.
1) (x² + 1)3 − 3 (x² - 1)? - x²(x^+ 9)
2) (x - 2)3 - (x - 1)3 + 3x (x + 3)
1) (x² + 1)3 − 3 (x² - 1)? - x²(x^+ 9)
2) (x - 2)3 - (x - 1)3 + 3x (x + 3)
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Ответ:
1) -x³ - 9x² + 6
2) 3x² + 9x - 3