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Ta có :
\(\frac{6\frac{1}{4}}{x}=\frac{x}{1,96}\)
\(\Leftrightarrow\frac{\frac{25}{4}}{x}=\frac{x}{1,96}\)
\(\Rightarrow x^2=\frac{25}{4}.1,96\)
\(\Leftrightarrow x^2=\frac{49}{4}\)
\(\Leftrightarrow x=\sqrt{\frac{49}{4}}\)
\(\Rightarrow x=\frac{7}{2}\)
P/s tham khảo nha
\(\frac{6\frac{1}{4}}{x}=\frac{x}{1,96}\)
\(\Leftrightarrow x.x=6\frac{1}{4}.1,96\)
\(\Leftrightarrow x^2=12,25\)
\(\Leftrightarrow x^2=3,5^2\)
\(\Leftrightarrow x=3,5\)
Vậy \(x=3,5\)
\(\frac{6\frac{1}{4}}{x}=\frac{x}{1,96}\)
\(\Rightarrow x^2=6\frac{1}{4}.1,96\)
\(\Rightarrow x^2=\frac{25}{4}.\frac{49}{25}\)
\(\Rightarrow x^2=\frac{49}{4}\)
\(\Rightarrow x^2=\left(\frac{7}{2}\right)^2\)
\(\Rightarrow x=\frac{7}{2}\)
vậy \(x=\frac{7}{2}\)
Ta có : \(\frac{6\frac{1}{4}}{x}=\frac{x}{1,96}\)
\(\Rightarrow\frac{6,25}{x}=\frac{x}{1,96}\)
\(\Rightarrow\frac{6,25.1,96.x}{x.1,96}=\frac{x.x}{1,96.x}\)
\(\Rightarrow6,25.1,96.x=x.x\)
\(\Rightarrow12,25.x=x.x\)
Vì \(x=x\)nên để \(12,25.x=x.x\)thì \(12,25=x\)
Vậy \(x=12,25\)
=>x.x=\(6\frac{1}{4}.1,96\)
=>x^2=12,25
=>x=3,5 hoặc x=-3,5
Ta có: \(\frac{6\frac{1}{4}}{x}=\frac{x}{1,96}\)
\(\left(=\right)\frac{\frac{25}{4}}{x}=\frac{x}{1,96}\)
\(\left(=\right)x^2=12,25\)
\(=>\orbr{\begin{cases}x=3,5\\x=-3,5\end{cases}}\)
học tốt
\(\frac{6+\frac{1}{4}}{x}=\frac{x}{1,96}\)
=> \(x^2=\left(6+\frac{1}{4}\right)x1,96\)
=> \(x^2=\frac{25}{4}x1,96\)
=> \(x^2=12,25\)
=> \(x=3,5\)
\(\frac{6\frac{1}{4}}{x}=\frac{x}{1,96}\)
=> \(x^2=6\frac{1}{4}.1,96\)
=> \(x^2=12,25\)
=> \(x^2=\left(\pm3,5\right)^2\)
=> \(x=\pm3,5\)
Vậy \(x\in\left\{3,5;-3,5\right\}\)
\(\frac{6\frac{1}{4}}{x}=\frac{x}{1,96}\)
\(\frac{6,25}{x}=\frac{x}{1,96}\)
\(\Rightarrow6,25.1,96=x^2\)
\(\Rightarrow12.25=x^2\)
\(\Rightarrow\sqrt{12,25}=x=3,5\)
\(\Rightarrow\left[\begin{array}{nghiempt}x=3,5\\x=-3,5\end{array}\right.\)