Разложите на множители: 1) 11x-33xy2) xy+x3) a^4 - 2a^24) 20 x^3 y^2+4x^2y^35) a (b-5) - (b-5) 6) ac+bc-2 ad - 2 bd7) 5ay - 3 bx + ax - 15 by

1) 11x-33xy=11 х (1-3 у);

2) xy+x=х (у+1);

3) a^4 - 2a^2=a^2 (a^2-2);

4) 20 x^3 y^2+4x^2y^3=4x^2*y^2 (5x+y);

5) a (b-5) - (b-5) = (b-5) (a-1);

6) ac+bc-2 ad - 2 bd = (ac+bc) + (-2 ad - 2 bd) = c (a+b) - (2ad+2bd) = c (a+b) - 2d (a+b) = (a+b) (c-2d);

7) 5ay - 3 bx + ax - 15 by = (5ay-15by) + (ax-3bx) = 5y (a-3b) + x (a-3b) = (a-3b) (5y+x)