1. 6a - 9b = 3(2а - 3b)
2. 5ab - 5ac = 5a*(b-c)
3. a^7 + a^4 = a^4 *(a^3 +1); a^4 *(a+1)*(a^2 - a+1)
4. 15ab^2 + 5ab = 5ab*(3b+1)
5. x^2 - 36 = x^2 - 6^2; (x-6)*(x+6)
6. m^10 - n^6 = m^2*5(степень)-n^2*3(степень); (m^5)^2-(n^3)^2; (m^5 - n^3)*(m^5 + n^3)
7. 4x^2 - 81y^2 = 2^2 x^2-9^2 y^2; (2x)^2 - (9y)^2; (2x-9y) *(2x+9y)
8. 14 - 14m^2 = 14(1-m^2); 14(1-m)*(1+m)
9. 5x^2 y^2 - 45a^2 b^2 = 5(x^2 y^2 - 9a^2 b^2); 5(xy-3ab)*(xy+3ab)
10. 3x^2 - 24xy + 48y^2 = 3(x^2 - 8xy+16y^2); 3(x-4y)^2