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scoate factorul comun:
4a+8
15b+10
6b+4b
3x+9y
8a+6b
3x+6y+9z


Răspuns :

4a+8=4(a+2)
15b+10=5(3b+2)
6b+4b=2(3b+2b)
3x+9y=3(x+3y)
8a+6b=2(4a+3b)
3x+6y+9z=3(x+2y+3z)