Quadratic Function (1 Viewer)

Makro

Makro

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Show that
(2x2 + 7x - 1)2 + 2(2x2 + 7x - 1) - 15 = 0
has four real roots: two rational and two irrational. Find these roots.
Click to expand...
I've tried doing it but my roots are wrong. Help?

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

Thanks.

 
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