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Descompune-ti in factori :

10ab + 5b²=
a²-6ab+9b²=
2a-2b+ca-cb=
25-y²=


Răspuns :

10ab+5b²=
5b(a+2b)
a²-6ab+9b²=(a-3b)²
2a-2b+ca-cb=2(a-b)+c(a-b)
25-y²=(5-y)(5+y)
succes
a) =5b(2a+b)
b)=(a-3b)²
c)=2(a-b)+c(a-b)=(a-b)(2+c)
d)=(5-y)(5+y)