Đ

\(( x − 3 ) ( 2 x − 1 ) = 5 ( x − 3 )\)

\(<=>2x^2-x-6x+3=5x-15\)

\(<=>2x^2-7x+3=5x-15\)

\(<=>2x62-7x+3-5x+15=0\)

\(<=>2x^2-12x=18=0\)

\(<=> (2x^2-12x+18):2=0\)

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

\(<=>(x-3)^2=0\)

\(<=>x=3\)

\( C. x.y\)

a

kick

in

 Hello

 what you name =>>> what your name

-> my name is lan anh

how old are you

->> I'm 16 years old

how are you

->I'm fine

what animal do you like 

-> I like dog

do you like dolphin 

-> yes I do

what color do you like 

-> pink

what do you like 

-> I like reading stories

do you like mum and dad

-> yes I do

\(x\)∈\(R\)