Quadratic Function (1 Viewer)

[Makro]

Show that
(2x² + 7x - 1)² + 2(2x² + 7x - 1) - 15 = 0
has four real roots: two rational and two irrational. Find these roots.

I've tried doing it but my roots are wrong. Help?

Answer: x = 0.5, -4, -0.719, -2.78

Thanks.

 

[foram]