Разложить на множители. 1)xy+3y+xz+3z 2)25-c² 3)ab²-2abc+ac²

1)xy+3y+xz+3z=y(x+3)+z(x+3)=(x+3)(y+z). 2)25-c²=(5-c)(5+c). 3)ab²-2abc+ac²=a(b²-2bc+c²)=a(b-c)².

1)xy+3y+xz+3z=y(x+3)+z(x+3)=(x+3)(y+z) 2) [latex]25-c^{2} = 5^{2}-c^{2} =(5-c)(5+c)[/latex] 3)[latex]ab^{2} -2abc+ac^{2} =a(b^{2} -2bc+c^{2})=a(b-c)^{2} =a(b-c)(b-c)[/latex]