belgy00
belgy00
30-11-2016
Mathematics
contestada
divide 21a3 - 14a by 7
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tibboyz123
tibboyz123
30-11-2016
[tex] \frac{21a^3-14a}{7} [/tex] = 3a³ - 2a "or" a(3a²-2)
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manyemaadit
manyemaadit
30-11-2016
the answer is 3a3-2a
so 21a3-14a, lets see, we can factor it by 7 so,
21a3-14a = 7(3a3-2a)
so, if you divide 7(3a3-2a) by 7, the sevens cancel out and the answer equals 3a^3-2a
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