Question

помогите только с 8,9,10

Answer 1

Ответ:

8. $x(x-1)(x+y)$

9. $(a+5b)(1+a-5b)$

10. $c^{4} (c-1)(c+1)(a-1)$

Объяснение:

8. $x^{3} -yx-x^{2} +yx^{2} = x(x^{2} -y-x+yx) = x(x^{2} -y-x+xy) = x(x(x-1)+y(-1+x))= x(x-1)(x+y)$

9. $a+5b+a^{2}-25b^{2} = a+5b+(a-5b)(a+5b)=(a+5b)(1+a-5b)$

10. $ac^{6} -ac^{4} -c^6} +c^{4} = c^{4} (ac^{2} -a-c^{2} +1) = c^{4} (a(c^{2} -1)-(c^{2} -1))=c^{4} (c^{2} -1)(a -1) = c^{4} (c-1)(c+1)(a-1)$