Question 817230
one number is x
other number is 2x-3

the product is 405

x(2x-3)=405

2x^2-3x=405

2x^2-3x-405=0

use quadratic formula
a=	2	,	b=	-3	,	c=	-405
							
b^2-4ac=	9	+	3240				
b^2-4ac=	3249						
{{{	sqrt(	3249	)=	57	}}}		
{{{x=(-b+-sqrt(b^2-4ac))/(2a)}}}							
{{{x1=(-b+sqrt(b^2-4ac))/(2a)}}}							
x1=(	3	+	57	)/	4		
x1=	15.00						
{{{x2=(-b-sqrt(b^2-4ac))/(2a)}}}							
x2=(	3	-57	) /	4			
x2=	-13.50						

15 is one number other is 
2*15-3=27

15*27=405

if the number is -13.5
other number is -30