answer please it is very very urgent!! I'll mark you brainliest
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Answer:
2(a² - 2a + 2)
Step-by-step explanation:
(a² - 7a + 10 + 3a² + 4a - 15) - (2a² + a - 9)
= (4a² - 3a - 5) - 2a² - a + 9
= 2a² - 4a + 4
= 2(a² - 2a + 2)
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