Пж решите дам 25 балов , Все кроме 2 и 6

267. 1) ac²-ad+c³-cd-bc²+bd=(ac²-ad)+(c³-cd)-(bc²-bd)=     =a(c²-d)+c(c²-d)-b(c²-d)=(c²-d)(a+c-b) 3) am²+cm²-an+an²-cn+cn²=(am²+cm²)-(an+cn)+(an²+cn²)=     =m²(a+c)-n(a+c)+n²(a+c)=(a+c)(m²-n+n²)=(a+c)(m²+n²-n) 4) xy²-ny²-mx+mn+m²x-m²n=(xy²-ny²)-(mx-mn)+(m²x-m²n)=     =y²(x-n)-m(x-n)+m²(x-n)=(x-n)(y²-m+m²)=(x-n)(m²+y²-m) 5) a²b+a+ab²+b+2ab+2=(a²b+ab²+2ab)+(a+b+2)=     =ab(a+b+2)+(a+b+2)=(a+b+2)(ab+1)     

1) ac²-ad+c³+cd+bc²+bd = (ac²+c³-bc³) - (ad+cd-bd)= c²*(a+c-b) - d(a+c-b)= =(c²-d)*(a+c-b) 3) am²+cm²-an+an²-cn+cn²= m²*(a+c) - n*(a+c)+ n²*(a+c)=(m²-n+n²)* (a+c) 4) xy²-ny²+mx+mn+m²x-m²n=y²*(x-n) - m*(x-n)+ m²*(x-n)= (y²-m+m²)*(x-n) 5) a²b + a+ab² + b+ 2ab+2 =a(ab+1)+b(ab+1)+2(ab+1)= (a+b+2)(ab+1) 6) x²-xy+x-xy²+y³-y² = x*(x-y+1) - y²*(x-y+1) = (x-y+1)* (x-y²)