Question 1050877
f(x)= x^3+3x^2-2x-4, -1 is a zero.
Using Synthetic Division
-1	1	3	-2	-4
		-1	-2	4
	1	2	-4	0
        x^2 + 2x - 4 = 0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (-b +- sqrt( 4 + 16))/(2*a) }}}
{{{x = (-b +- sqrt( 20))/(2*a) }}}
{{{x = (-2 +- 2 sqrt(5))/(2) }}}
{{{x = (-1 +-  sqrt(5)) }}} 
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f(x) = (x+1)(x -(-1 +√5 ))(x - (-1-√5)
f(x) = (x+1)(x + 1 -√5 )(x +1 +√5)