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Please help ASAP with these problems!

Prove that: (12^13-12^12+12^11)(11^9-11^8+11^7) is divisible by 3, 7, 19, and 37. _ times 3 times 7 times 19 times 37
Factor completely: (4x^a+2)+20x^a
Factor completely: (15x^2c+3)-(25x^c+1)

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you gotta write that out again because.
User Hemant Bavle
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Answer:

HUH

Explanation:

User SKumar
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