Question

resolva a questão do segundo grau 2x elevado a 2 + x - 3 = 0​

Answer 1

Olá!

$2x^{2} +x-3=0\\ \\ \\ x=\dfrac{-b\pm\sqrt{b^{2}-4\cdot a \cdot c} }{2\cdot a}~~~\to~~~\dfrac{-1\pm\sqrt{1^{2}-4\cdot 2 \cdot (-3)} }{2\cdot 2}~~~\to ~~~\dfrac{-1\pm\sqrt{25} }{4}~~~\to~~~ \dfrac{-1\pm5 }{4}\\ \\ \\ \boxed{x'=1~~~e~~~x''=-\dfrac{3}{2} }$

:)