Question

giúp mk vs

Answer 1

a: =>x^3-3x^2+3x-1+3x^2+6x+3=x^3+8

=>9x+4=8

=>9x=4

=>x=4/9

d: =>(2x-3)^2-(x-5)^2=0

=>(2x-3-x+5)(2x-3+x-5)=0

=>(x+2)(3x-8)=0

=>x=8/3 hoặc x=-2

c: =>(x-2)(x-11)=0

=>x=2 hoặc x=11

b: =>(x-2)(x-6)=0

=>x=2 hoặc x=6