Question 593543
{{{x^2-12x-15}}}

ince the factors are not integers we can find the solution by using the quadratic formula

Find the roots of the equation by quadratic formula								
								
a=	1	,	b=	-12	,	c=	-15	
								
b^2-4ac=	144	+	60					
b^2-4ac=	204		
{{{	sqrt(	204	)=	14.28	}}}
{{{x=(-b+-sqrt(b^2-4ac))/(2a)}}}								
{{{x1=(-b+sqrt(b^2-4ac))/(2a)}}}								
x1=(	12	+	14.28	)/	2			
x1=	13.14							
x2=(	12	-14.28	) /	2				
x2=	-1.14							

(13.14,-1.14)				
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