Question

giải giúp mik vs tìm x:

x² -4x+8 =2x-1

Answer 1

ta có:

x²-4x+8=2x-1

=>x²-4x+8-(2x-1)=0

=>x²-6x+9=0

=>(x-3)²=0

=>x-3=0

=>x=3

Answer 2

\(x^2-4x+8=2x-1\)

\(\Rightarrow x^2-4x+8-2x+1=0\)

\(\Rightarrow x^2-6x+9=0\)

\(\Rightarrow\left(x-3\right)^2=0\)

\(\Rightarrow x-3=0\)

\(\Rightarrow x=3\)