Tìm x sao cho: (x+5) (4−3x) −(3x+2)^2 +(2x+1)^3 = (2x−1) (4x^2 +2x+1)
Giải thích
x+54−3x−3x+22+2x+13=2x−14x2+2x+1
−3x2−11x+20−9x2−12x−4+8x3+12x2+6x+1=8x3−1
−17x+18=0
x=1817
Vậy x=1817
x+54−3x−3x+22+2x+13=2x−14x2+2x+1
−3x2−11x+20−9x2−12x−4+8x3+12x2+6x+1=8x3−1
−17x+18=0
x=1817
Vậy x=1817