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  • 19-03-2015
  • Mathematics
Answered

what two numbers multiply to -105 and add to 8



Answer :

Аноним Аноним
  • 19-03-2015
a b=-105  
a+b=8  
 x²+8x-105=0

x²+-7x+15x-105=0
x(x-7)+15(x-7)=0
(x-7)(x+15)=0     
a=-7
b=15
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