\(-2300v_3^2+16200v_3+43200=0\)
`<=>`\(-100\left(23v_3^2-162v_3-432\right)=0\)
`<=> `\(23v_3^2-162v_3-432=0\)
`=> Delta = (-162)^2 - 4.23.(-432) = 1833 > 0`
`=>PT` có `2` nghiệm phân biệt
`<=>`\(\left\{{}\begin{matrix}v_3=\dfrac{-b+\sqrt{\Delta}}{2a}=\dfrac{-\left(-162\right)+\sqrt{1833}}{2\cdot23}\\v_3=\dfrac{-b-\sqrt{\Delta}}{2a}=\dfrac{-\left(-162\right)-\sqrt{1833}}{2\cdot23}\end{matrix}\right.\)
`<=>`\(\left\{{}\begin{matrix}v_3=\dfrac{162+\sqrt{1833}}{46}\\v_3=\dfrac{162-\sqrt{1833}}{46}\end{matrix}\right.\)