Question

giúp mk vs!!! tím x, biết :

\(^{\left(x-1\right)^2}\)=4

Answer 1

\(\left(x-1\right)^2=4\)

\(=>\left(x-1\right)^2=\sqrt{4}\)

\(th1:x-1=2\)

\(x=3\)

\(th2:x-1=-2\)

\(x=-1\)

Answer 2

Answer 3

\(\left(x-1\right)^2=4\\ \Rightarrow\left(x-1\right)^2=\left(\pm2\right)^2\\ \Rightarrow\left\{{}\begin{matrix}x-1=2\\x-1=\left(-2\right)\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=3\\x=\left(-1\right)\end{matrix}\right.\)

Vậy \(x=3\) hoặc \(x=-1\)

Answer 4

(x-1)²=4

=>\(\left[{}\begin{matrix}x-1=2\\x-1=-2\end{matrix}\right.\) =>\(\left[{}\begin{matrix}x=3\\x=-1\end{matrix}\right.\)

vậy x\(\in\) {-1;3}

Answer 5

(x-1)^2=4

suy ra: (x-1)^2=2^2

vậy x-1=2

x =2+1

x =3

chú ý : ^ là lũy thừa vd 2^2 là 2 lũy thừa 2

Answer 6

Tui gửi trước mấy người mà tui bị đẩy xuống cuối z !!!!!!!!

Answer 7

\(\left(x-1\right)^2=4\)

\(\Leftrightarrow\)\(\left(x-1\right)^2=2^2\) hoặc \(\left(x-1\right)^2=\left(-2\right)^2\)

\(\Leftrightarrow\)(x-1)=2 hoặc (x-1)=-2

\(\Leftrightarrow\)x = 3 hoạc x = -1

Vậy x =3 hoặc x = -1