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(x+3)la puterea a doua +(x-1) la puterea a doua=?


Răspuns :

Folosesti formula :
(a+b)²=a²+2ab+b²
(x+3)²+(x-1)²=x²+2·x·3+3² + x²+2·x·1+1²=
Rezolvi acum .Cu placere