Question

f ) \(x^2-10x=-25\)

Answer 1

\(x^2-10x=-25\)

\(x^2-10x+25=0\)

\(x^2-2.x.5+5^2=0\)

\(\left(x-5\right)^2=0\)

\(\left(x-5\right)=0\)

\(x=0+5\)

\(x=5\)

Answer 2

\(\Rightarrow x^2-2.5.x+5^2=0\)

\(\Rightarrow\left(x-5\right)^2=0\)

\(\Rightarrow x-5=0\)

=> x=5

Vậy x = 5

Answer 3

f) \(x^2-10x=-25\)

\(\Leftrightarrow x^2-10x+25=0\)

\(\Leftrightarrow\left(x-5\right)^2=0\)

\(\Leftrightarrow x-5=0\)

\(\Leftrightarrow x=5\)