Question

TÌM x

a, \(\sqrt{x+2\sqrt{x}+1}\)=3

b,\(\sqrt{2x-1}+1\)=2x

Answer 1

câu b nhầm nhé 

b/ \(\Rightarrow\sqrt{2x-1}=2x-1\Rightarrow2x-1=\left(2x-1\right)^2\)

\(\Rightarrow\left(2x-1\right)\left(1-2x+1\right)=0\)

\(\Rightarrow2x-1=0\Rightarrow2x=1\Rightarrow x=\frac{1}{2}\)

hoặc \(2-2x=0\Rightarrow2x=2\Rightarrow x=1\)

vậy x = 1/2 ; x = 1