znanija.com/task/35056041
3. (2x)³ +3(-x²)² +(x²+1)² -9(x -x²-1) =8x³ +3x⁴+x⁴ +2x²+ 1 - 9x +9x²+ 9
= 4x⁴ + 8x³+ 11x² - 9x + 10 степень многочлена 4
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znanija.com/task/35056041
3. (2x)³ +3(-x²)² +(x²+1)² -9(x -x²-1) =8x³ +3x⁴+x⁴ +2x²+ 1 - 9x +9x²+ 9
= 4x⁴ + 8x³+ 11x² - 9x + 10 степень многочлена 4