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which number that we times give 189 when we adding give -34

 May 24, 2015

Best Answer 

 #3
avatar+128579 
+13

x + y = -34   →      y = -34 - x

 

(x)(y )= 189     so      ( x)(-34 - x)  = 189   simplify

 

-x^2 - 34x  = 189      rearrange

 

x^2 + 34x + 189 = 0   factor

 

(x + 27) (x + 7) = 0      and setting each factor to 0,   x = -27    or   x = -7

 

And whichever x is, y is the other.......

 

 

 May 24, 2015
 #1
avatar+11912 
0

I thought of this and came up with that if we multiply 63 by 3 we get 189 but I still can't figure out the second part of thequestion! 

 May 24, 2015
 #3
avatar+128579 
+13
Best Answer

x + y = -34   →      y = -34 - x

 

(x)(y )= 189     so      ( x)(-34 - x)  = 189   simplify

 

-x^2 - 34x  = 189      rearrange

 

x^2 + 34x + 189 = 0   factor

 

(x + 27) (x + 7) = 0      and setting each factor to 0,   x = -27    or   x = -7

 

And whichever x is, y is the other.......

 

 

CPhill May 24, 2015

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