Question

me ajudem 2х²- 7х+3=0​

Answer 1

$\Large\mathsf\displaystyle{} {2x}^{2} - 7x + 3 = 0 \\\\ \Large\mathsf\displaystyle{}\begin{cases}a = 2 \\ b = - 7 \\ c = 3\end{cases} \\\\ \Large\mathsf\displaystyle{}x = \dfrac{ -\left( - 7\right) \pm \sqrt{\left( - 7\right)^{2} - 4\cdot2 \cdot3} }{2\cdot2} \\ \\\\\Large\mathsf\displaystyle{}x = \dfrac{7 \pm \sqrt{49 - 24} }{4} \\\\ \Large\mathsf\displaystyle{}x = \dfrac{7 \pm \sqrt{25} }{4} \\\\ \\ \Large\mathsf\displaystyle{}x = \dfrac{7 \pm5}{4} \\\\ \\ \Large\mathsf\displaystyle{}x = \dfrac{7 + 5}{4} \\\\ \\ \Large\mathsf\displaystyle{}x = \dfrac{7 - 5}{4} \\ \\ \\ \Large\mathsf\displaystyle{}x = 3 \\ \\\Large\mathsf\displaystyle{}x = \dfrac{1}{2}$

$\Large\displaystyle\text{ \begin{gathered} \underline{\boxed{\boldsymbol{ x_{1} = \dfrac{1}{2} \: ou \: \: 0,5 }}}\end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \underline{\boxed{\boldsymbol{ x_{2} = 3 \\ }}}\end{gathered} }$

$\Large\mathsf\displaystyle{}\displaystyle\text{ \begin{gathered} \underline{\boxed{\boldsymbol{{ \red{Bons}} \blue{\:Estudos}}}}\end{gathered} }$