\(\frac{x}{3}=\frac{48}{x}\)
\(\Rightarrow x×x=3.48\)
\(\Rightarrow x^2=144\)
\(\Rightarrow\)\(x^2\in\left\{12,-12\right\}\)
\(\frac{x}{3}=\frac{48}{x}\)
\(\Rightarrow x\cdot x=3\cdot48\)
\(\Rightarrow x^2=144\)
\(\Rightarrow x^2=\left(\pm12\right)^2\)
\(\Rightarrow x=\pm12\)
x/3=48/x
Suy ra x^2=3.48
x^2=144
Mà 144=12^2
Suy ra x^2=12^2
Suy ra x=12
\(\frac{x}{3}=\frac{48}{x}\)
\(\Rightarrow x.x=3.48\)
\(\Rightarrow x^2=144\)
\(\Rightarrow x^2=12^2\)
\(\Rightarrow x=12\)
Vậy x = 12
\(\frac{x}{3}=\frac{48}{x}\)
\(\Leftrightarrow x^2=144\)
\(\Leftrightarrow x=12,x=-12\)
Vậy.....
À quên:
\(x^2=12^2=\left(-12\right)^2\)
\(\Rightarrow x\in\left\{12;-12\right\}\)
Vậy x \(\in\left\{12;-12\right\}\)
