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A) 2+3a+9a
B) 12c²+3-5c+9c2c-1
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Simplify 2+3a+9a
So the answer is 2+12a
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Group like terms:
= 12c²-5c+9c-2c+3-1
Substract the numbers: 3-1=2
= 12c²-5c+9c-2c+2
Add similar elements: -5c+9c-2c=2c
So the answer is 12c²+2c+2
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