Question

(2x + 3)² = 25

Answer 1

dễ mà :

\(\left(2x+3\right)^2=25\)

\(\left(2x+3\right)^2=5^2\)

2x + 3 =5

2x=5-3

2x=2

x=2 :2

x=1

1 like nha bạn

Answer 2

\(\left(2x+3\right)^2=25\)

   =>   \(\left[{}\begin{matrix}\text{(2x+3)}^2=5^2\\\text{(2x+3)}^2=\left(-5\right)^2\end{matrix}\right.\)

=>\(\left[{}\begin{matrix}\text{2x+3=5}\\\text{2x+3=-5}\end{matrix}\right.\)

=>\(\left[{}\begin{matrix}\text{2x=2}\\\text{2x=-}8\end{matrix}\right.\)

=>\(\left[{}\begin{matrix}x=1\\x=-4\end{matrix}\right.\)

Chúc bạn học tốt!

#Yuii