Question

Efectúa: 4x(x - 1) - (2x - 1)​

Answer 1

Respuesta:

$4x(x - 1) - (2x - 1)\\4x^2 - 4x - 2x - 1 \\4x^2 - 6x - 1\\\\formula-general\\\frac{-b +-\sqrt{b^2 - 4ac} }{2a} \\a= 4\\b = -6\\c= -1\\\frac{-(-6) +-\sqrt{-6^2 - 4(4)(-1)} }{2(4)}\\ \frac{6+-\sqrt{36 + 16} }{8} \\ \frac{6+-\sqrt{52} }{8} \\ \frac{6+-(2)\sqrt{13} }{8} \\x_1 = \frac{6+(2)\sqrt{13} }{8} \\x_2= \frac{6-(2)\sqrt{13} }{8} \\x_1=1.65\\x_2 = -0.15\\\\espero-haberte-ayudado:)$