Ответ:
- \(7ax+7bx=7x(a+b)\);
- \(3by-6b=3b(y-2)\);
- \(-5mn+5n=5n(1-m)\);
- \(3a+9ab=3a(1+3b)\);
- \(5y^2-15y=5y(y-3)\);
- \(3x+6x^2=3x(1+2x)\);
- \(a^2-ab=a(a-b)\);
- \(8mn-4m^2=4m(2n-m)\);
- \(-6ab+9b^2=3b(3b-2a)\);
- \(x^2y-xy^2=xy(x-y)\);
- \(ab-a^2b=ab(1-a)\);
- \(-p^2q^2-pq=-pq(pq+1)\).
