Question

X + √x - 4 = 8√x - 16

Answer 1

Answer 2

<=> x- 7√x+12=0

<=> (√x)² -4√x-3√x +12=0

<=> √x(√x-4)-3(√x-4)=0

<=> (√x-3)(√x-4)=0

=> x=9 hoặc x=16

Answer 3

Ta có: \(x+\sqrt{x}-4=8\sqrt{x}-16\)

\(\Leftrightarrow x-7\sqrt{x}+12=0\)

\(\Leftrightarrow\left(\sqrt{x}-3\right)\left(\sqrt{x}-4\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=9\\x=16\end{matrix}\right.\)