1) б) 2a+4b-ab-2b^2=a(2-b)-2b(2-b)=(2-b)(a-2b)
в) x^2-64y^2=(x-8y)(x+8y)
г) -2x^3-28x^2-98x= (-2x)(x^2+14x+49)
2)(x-4)^2-25=0 ((x-4)-5)((x-4)+5)=0 x-4-5=0 или x-4+5=0 x1=9 x2=-1
1) б) 2a+4b-ab-2b^2=a(2-b)-2b(2-b)=(2-b)(a-2b)
в) x^2-64y^2=(x-8y)(x+8y)
г) -2x^3-28x^2-98x= (-2x)(x^2+14x+49)
2)(x-4)^2-25=0 ((x-4)-5)((x-4)+5)=0 x-4-5=0 или x-4+5=0 x1=9 x2=-1