Question

(3x+2)^2 . 5 = 125 
giải giúp mik vs ạ 

 

Answer 1

\(\left(3x+2\right)^2.5=65\)
\(\Leftrightarrow\left(3x+2\right)^2=13\)
What?

Answer 2

\(\left(3x+2\right)^2\cdot5=65\\ \left(3x+2\right)^2=65:5\\ \left(3x+2\right)^2=13\)

đề bài sai ạ

Answer 3

\(\left(3x+2\right)^2.5=65\\ \Rightarrow\left(3x+2\right)^2=65:5\\ \Rightarrow\left(3x+2\right)^2=13\\ \Rightarrow\left[{}\begin{matrix}3x+2=\sqrt{13}\\3x+2=-\sqrt{13}\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=\dfrac{\sqrt{13}-2}{3}\\x=\dfrac{-\sqrt{13}-2}{3}\end{matrix}\right.\)

Answer 4

lớp mấy vậy

Answer 5

ơ kq bằng 125 mà