Rút gọn phân thức: 2x^3 - 7x^2 - 12x + 45/ 3x^3 - 19x^2 + 33x -9
Giải thích
2x3−7x2−12x+453x3−19x2+33x−9=2x3−6x2−x2+3x−15x+453x3−9x2−10x2+30x+3x−9=2x2x−3−xx−3−15x−33x2x−3−10xx−3+3x−3=x−32x2−x−15x−33x2−10x+3=2x2−x−153x2−10x+3=2x2−6x+5x−153x2−9x−x+3=2xx−3+5x−33xx−3−x−3=x−32x+5x−33x−1=2x+53x−1