Question

x^2-4x+4=0

tìm x trình bày ra luôn!

Answer 1

\(\Leftrightarrow x-2=0\)

hay x=2

Answer 2

\(\text{x^2-4x+4=0}\\ \left(x-2\right)^2=0\\ x-2=0\\ x=0+2\\ x=2\)

Answer 3

2