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b)x(x²+2x+1)-(-4x³+8x²-6):2=x³ +2x²+x +2x³ -4x² +3= 3x³ - 2x² +3
x³+2x²+x-(-2x³+4x²-3)= x³+2x²+x+2x³-4x²+3=3x³+2x²+3+x
b) x(x² + 2x + 1) - (-4x³ + 8x² - 6) : 2 =x³+2x²+x+2x³-4x²+3=3x³-2x²+3