5 a 2 − 6 a + 7 a 2 + 3 a − 2 + 8 a + 7 = 5 a 2 + 7 a 2 − 6 a + 3 a + 8 a − 2 + 7 = 12 a 2 + 5 a + 5
12a²+5a+5 ;
The expression 5 a 2 − 6 a + 7 a 2 + 3 a − 2 + 8 a + 7 simplifies to 12 a 2 + 5 a + 5 by combining like terms. The quadratic terms add up to give 12 a 2 , the linear terms give 5 a , and the constants result in 5 .
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