Question

(2
$(2x)x - 1 = 4$

Answer 1

2x^2-2x=4 <>2x^2-2x-4=0 a que vamos usar fórmula de Bhaskara x1/2=2+-6/4
x1=2+6/4 <> x1=2
x2=2-6/4 <> x2=-1