(a² - 9) (a + 6) ÷ a² + 9a + 18
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0
Answer:
55a
Step-by-step explanation:
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1
Answer:
(a² - 9) (a + 6) ÷ a² + 9a + 18 = a-3
Step-by-step explanation:
(a² - 9) (a + 6) ÷ a² + 9a + 18
consider , a² + 9a + 18
= a² + 6a + 3a + 18
= a (a+6) + 3(a + 6)
= (a + 6)(a+3)
so, (a² - 9) (a + 6) ÷ a² + 9a + 18
= [(a² - 9) (a + 6)] / (a + 6)(a+3)
= (a² - 9) / (a+3)
= (a² - 3²) / (a+3)
= (a+3)(a-3) / (a+3)
= (a-3)
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