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avatar+397 

The quadratic $x^2-4x-14=3x+16$ has two solutions. What is the positive difference between these solutions?

Thanks!

 Jun 8, 2019
 #1
avatar+106539 
+3

x^2 - 4x - 14  = 3x + 16          rearrange as

 

x^2 -7x -30   =  0       factor

 

(x -10) ( x + 3) = 0

 

Set each factor to 0 and solve for x

 

x - 10  = 0                x + 3  = 0

 

x  =10                      x = -3

 

The positive difference  is   10 - (-3)   = 13

 

 

cool cool cool

 Jun 9, 2019
 #2
avatar+397 
+2

Thanks!

 Jun 9, 2019

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