Kceran1997rans
Answered

a.(a+b)=9 b.(a+b)=27 ise a+b kaçtır ?

Sagot :

[tex]a^{2}[/tex] + ab =) 9
[tex]b^{2}[/tex]  + ab =) 27

bi tarafı - ile carp .

 -[tex]a^{2}[/tex]+ [tex]b^{2}[/tex]  =) 18

(b+a).(b-a) =) 18 diye açılır...

Gerisi gelecek dur :D

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