Question

Determine as raizes da equação -4x2 -10x -4=0
Resolução por favorrr

Answer 1

$-4x^2 - 10x - 4 = 0\\\Delta = (-10)^2 - 4 \cdot (-4) \cdot (-4)\\\Delta = 100 + 16 \cdot (-4)\\\Delta = 100 - 64\\\Delta = 36\\\\x = \frac{-(-10)\pm \sqrt6}{2 \cdot (-4)} = \frac{10\pm 6}{8}\\\\x_1 = \frac{10 - 6}{8} = \frac{4}{8} = \frac 12\\\\x_2 = \frac{10+6}{8} = \frac{16}{8} = 2\\\\S = \{\frac 12; \ 2}\}$