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descompuneti in factori  :1.6mn+6m   ,2.12by-9b,    3.15ax+20bx.........rog mult

Răspuns :

Cred ca te referi la asta :
1.  6mn+6m =   6m * (n +1)
2.  12by-9b =  3b * (4y -3)
3.  15ax+20bx =  5x* (3a + 4b)
4. [tex] 7y^{5} + 21 y^{3} = 7 y^{3} ( y^{2} + 3)[/tex]
Descompui in factori prin metoda factorului cumun.
1. 6mn+6m=6m(n+1) ; 2. 12by-9b= 3b(4y-3) ; 3. 15ax+20bx= 5x(3a+4b)
[tex] 7y^{5} + 21y^{3} [/tex]=[tex]7y^{3} ( y^{2} +3)[/tex]