Tìm x:
Tìm x:
a, (x-3)^3-(x-3).(x^2+3x+9)+9.(x+1)^2=4
b, (x^2-1)^3-(x^4+x^2+1).(x^2-1)=0
c,(x-1)^3+(2-x).(4+2x+x^2)+3x.(x+2)=16
helps me!
a, (x-3)^3-(x-3).(x^2+3x+9)+9.(x+1)^2=4
b, (x^2-1)^3-(x^4+x^2+1).(x^2-1)=0
c,(x-1)^3+(2-x).(4+2x+x^2)+3x.(x+2)=16
helps me!