Question

rút gọn biểu thức

(x mũ 2-2x+3).(x-4)

Answer 1

\(\left(x^2-2x+3\right).\left(x-4\right)\\ =x^2\left(x-4\right)-2x\left(x-4\right)+3\left(x-4\right)\\ =x^3-4x^2-2x^2+8x+3x-12\\ =x^3-6x^2+11x-12\)

Answer 2

\(\left(x^2-2x+3\right)\left(x-4\right)\\ =x^3-2x^2+3x-4x^2+8x-12\\ =x^3-6x^2+11x-12\)