Question 1180384
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Hi
1 and -2 are roots:
Using Synthetic Division:

1	1	2	-2	-3	2
		1	3	1	-2
-2	1	3	1	-2	0
		-2	-2	2	
	1	1	-1	0	
        x^2  +  x  -1 = 0      {{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
 
   {{{x = (-1 +- sqrt(5))/(2) }}}
      x = .618  x = -1.618  (rounded to 4 decimal places)
 x = { -2, -1.618, .618, 1}
Wish You the Best in your Studies.
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