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a fost răspuns

Scoate factor comun pe 7: a) 7a+7b . B) 14a+21b . c) 7a-28 . d) 21x+14y+7 e) 7x+14y-35 f) 21 xy-35z+ 14

Răspuns :

CosmoteRo
7a+7b=7(a+b)
14a+21b=7(2a+3b)
7a-28=7(a-4)
21x+14y+7=7(3x+2y+1)
7x+14y-35=7(x+2y-5)
21xy-35z+14=7(3xy-5z+2)
7(à+b)
7(2a +3b)
7(a-4)
7(3x+2y+1)
7(x+2y-5)
7(3xy-5z+2)

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