7 номер решите быстрее

9-6x²+x^4-9-6x³-x^6   / -6+x²-x³= =-6x²-6x³-x^6+x^4 /-6+x²-x³= =-6x²(1+x)-x^4(x²-1) /-6+x²-x³= =-6x²(x+1)-x^4(x-1)(x+1) /-6+x²-x³= =(x+1)(-6x²-x^4(x-1))/-6+x²-x³= =(x+1)(-6x²-x^5+x^4) /-6+x²-x³= =(x+1) x²(-6-x³+x²) /-6+x²-x³= =(x+1)x² (1.2+1)X 1.2²=2.2X1.44=3.168