9a² - 324
factorize this please
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Answer:
(3a+18)(3a-18)
Step-by-step explanation:
9a²-324
9a² can be written as (3a)²
324 can be written as 18²
=(3a)²-(18²)) BY USING a²-b²=(a+b)(a-b)
=(3a+18)(3a-18)
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