Question

Answer 1

a: =>3x^3-3x^2-2x^2+2x+6x-6=0

=>(x-1)(3x^2-2x+6)=0

=>x-1=0

=>x=1

b: =>x^3-x^2-2x^2+2x+4x-4=0

=>(x-1)(x^2-2x+4)=0

=>x-1=0

=>x=1

Answer 2

a,3(x^3-3^2+3x-1)+4x^2-x-3=0

3(x-1)^3+4(x-1)(x+1)-(x-1)=0

(x-1)(3x^2-6x+3+4x+1-1)=0

(x-1)(3x^2-2x+3)=0

=>x-1=0(do 3x^2-2x+3>0)

=>x=1

 

Answer 3

a)3x^3-3x^2-2x^2+2x+6x-6=0

3x^2(x-1)-2x(x-1)+6(x-1)=0

(3x^2-2x+6).(x-1)=0

x=1

b)x^3-x^2-2.x^2+2x+4x-4=0

(x^2-2x+1).(x-1)=0

(x-1)^3=0

x=1