Question

X² +3x+ 2
Qual a resposta

Answer 1

X² +3x+ 2 = 0

utilizar a fórmula de Bhaskara para resolver essa equação, sendo que

a=1,b=3,c=2.

$\Delta &= b^2-4\cdot a \cdot c\\\\\Delta &= 3^2-4\cdot 1\cdot 2 \\\\\Delta &= 9-8 \\\\\Delta &= 1 \\ \\x &= \dfrac{-b\pm\sqrt{\Delta}}{2\cdot a} \\\\x &= \dfrac{-3\pm\sqrt{1}}{2\cdot 1} \\\\x &= \dfrac{-3\pm 1}{2} \\\\x_1 &= \dfrac{-3 + 1}{2} = \dfrac{-2}{2} = -1\\\\x_2 &= \dfrac{-3-1}{2} = \dfrac{-4}{2} = -2\\\\\end{align}$