Question

2.(x-7)^2=50 giúp mình mới ạ

^ dấu này là mũ nhé

Answer 1

\(2\left(x-7\right)^2=50\)

\(\left(x-7\right)^2=\dfrac{50}{2}=25=5^2\)

\(\Leftrightarrow\left[{}\begin{matrix}x-7=5\\x-7=-5\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=12\\x=2\end{matrix}\right.\)

Answer 2

\(2.\left(x-7\right)^2=50\)

\(\left(x-7\right)^2=50:2\)

\(\left(x-7\right)^2=25\)

\(\left(x-7\right)^2=5^2=\left(-5\right)^2\)

TH1:

\(=>x-7=5\)

\(x=5+7\)

Answer 3

Mình làm tiếp ( do nãy bấm nhầm ):

\(...x=12\)

TH2: 

\(x-7=\left(-5\right)\)

\(x=\left(-5\right)+7\)

\(x=2\)

\(#WendyDang\)

Answer 4

\(2\cdot\left(x-7\right)^2=50\\ \left(x-7\right)^2=25\\ x-7=\sqrt{25}\\ x-7=5\\ x=12\)

Answer 5

2.(x-7)^2=50

(x-7)^2=50:2

(x-7)^2=25

(x-7)^2=5^2

=>x-7=5

x=5+7

x=12

vậy x=12