Question

giải hộ mình vs ạ 

Answer 1

a)
\(x^2-6x+9-4=0\)
\(x^2-6x+5=0\)
\(x^2-x-5x+5=0\)
\(x\left(x-1\right)-5\left(x-1\right)=0\)
(x-5)(x-1)=0
x-5=0  hoặc  x-1=0
x=5     hoặc   x=1
b)
\(\left(x-5-x-3\right)\left(x-5+x+3\right)=0\)
\(-8.\left(2x-2\right)=0\)
\(-8.2\left(x-1\right)=0\)
x-1=0
x=1