Question

1 ) Resolva a equação: 4x² + 8x + 6 = 0
a) 32
b) -32
c) 160
d) -160​

Answer 1

Resposta:

$4x^2+8x+6=0\\\\x_{1,\:2}=\frac{-8\pm \sqrt{8^2-4\cdot \:4\cdot \:6}}{2\cdot \:4}\\\\x_{1,\:2}=\frac{-8\pm \:4\sqrt{2}i}{2\cdot \:4}\\\\x_1=\frac{-8+4\sqrt{2}i}{2\cdot \:4},\:x_2=\frac{-8-4\sqrt{2}i}{2\cdot \:4}\\\\x=-1+i\frac{\sqrt{2}}{2},\:x=-1-i\frac{\sqrt{2}}{2}\\\\B)$