đk : x khác 0
\(pttđ:\dfrac{50}{x}+\dfrac{2x}{67}-\dfrac{8x}{192}=\dfrac{66}{x}-\dfrac{43}{50}+\dfrac{4x}{x}+\dfrac{45x}{12}\)
\(\Leftrightarrow\dfrac{50}{x}+\dfrac{2x}{67}-\dfrac{8x}{192}=\dfrac{66}{x}+\dfrac{4x}{x}-\dfrac{43}{50}+\dfrac{45x}{12}\)
\(\Leftrightarrow\dfrac{50}{x}+\dfrac{2x}{67}-\dfrac{8x}{192}=\dfrac{66+4x}{x}-\dfrac{43}{50}+\dfrac{45x}{12}\)
\(\Leftrightarrow\dfrac{50}{x}+\dfrac{2x}{67}-\dfrac{8x}{192}-\dfrac{66+4x}{x}+\dfrac{43}{50}-\dfrac{45x}{12}=0\)
\(\Leftrightarrow\dfrac{50.7718400}{x.7718400}+\dfrac{2x.115200x}{67.115200x}-\dfrac{8x.40200x}{192.40200x}-\dfrac{\left(66+4x\right).7718400}{x.7718400}+\dfrac{43.154368x}{50.154368x}-\dfrac{45x.643200x}{12.643200x}=0\)
<=> \(385920000+230400x^2-321600x^2-509414400-30873600x+6637824-28944000x^2=0\)
<=> \(-116856576-29035200x^2-30873600x=0\)
\(\Delta=\left(-29035200\right)^2-4.-116856576.-30873600=-1.36880899.10^6\)< 0
=> pt vô nghiệm
