c) (x^3 - 3x^2 + 6x): (-1/3 x)
Giải thích
c) x3−3x2+6x:−13x
=x3:−13x−3x2:−13x+6x:−13x
=1:−13.x3:x−3:−13.x2:x+6:−13.x:x
= 1 . (–3) . x3 – 1 – 3 . (–3) . x2 – 1 + 6 . (–3) . x1 – 1
= –3x2 + 9x – 18;
c) x3−3x2+6x:−13x
=x3:−13x−3x2:−13x+6x:−13x
=1:−13.x3:x−3:−13.x2:x+6:−13.x:x
= 1 . (–3) . x3 – 1 – 3 . (–3) . x2 – 1 + 6 . (–3) . x1 – 1
= –3x2 + 9x – 18;