1) 3y^2 (y^3 +1)= 3y^6+3y^2
(3a - 4ax +2) - (11a - 14ax) = 3a-4ax+2-11a+14ax= 10ax-8a+2
2) 3x^2 +9xy= 3x (x+3y)
10x^5 - 5х^3= 5x^3 (2x^2-1)
3) 4(х +1) = 15х -7 (2х +5)
4x+4= 15x-14x-35
4x-15x+14x+4+35=0
3x+39=0 | :3
x+ 13=0
x= -13
ответ: -13
1) 3y^2 (y^3 +1)= 3y^6+3y^2
(3a - 4ax +2) - (11a - 14ax) = 3a-4ax+2-11a+14ax= 10ax-8a+2
2) 3x^2 +9xy= 3x (x+3y)
10x^5 - 5х^3= 5x^3 (2x^2-1)
3) 4(х +1) = 15х -7 (2х +5)
4x+4= 15x-14x-35
4x-15x+14x+4+35=0
3x+39=0 | :3
x+ 13=0
x= -13
ответ: -13