Question

Resolva a equação do 2° grau 2x² + x – 3 = 0

Answer 1

$2x^2+x-3=0\\\\\Delta=b^2-4ac\\\Delta=1^2-4\cdot2\cdot(-3)\\\Delta=1+24\\\Delta=25\\\\x=\dfrac{-b\pm\sqrt\Delta}{2a}\\\\x = \dfrac{-1\pm\sqrt{25}}{2\cdot2}\\\\x = \dfrac{-1\pm5}{4}\\\\\\x_1=\dfrac{-1+5}{4}=\dfrac{4}{4}=1\\\\x_2=\dfrac{-1-5}{4}=\dfrac{-6}{4}=-\dfrac{3}{2}$

Answer 2

Resposta:

1 e -3/2

Explicação passo a passo:

confia