If A = 3 a²-2a+7 ,B= 2a²+4a+1 find :- A+B , A-B , 2A + 2B
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Answer:
1) A + B = 5a² + 2a + 8
2) A - B = a² - 6a + 6
3) 2A + 2B = 10a² + 4a + 16
Step-by-step explanation:
1) A + B = 3a² - 2a + 7 + 2a² + 4a + 1
= 5a² + 2a + 8
2) A - B = 3a² - 2a + 7 - 2a² - 4a - 1
= a² - 6a + 6
3) 2A + 2B = 2(A + B) = 2(5a² + 2a + 8)
= 10a² + 4a + 16
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