dmd
dmd
19-03-2015
Mathematics
contestada
what two numbers multiply to -105 and add to 8
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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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