give answer please immediately
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Answer:
(3x+n/2)(3x-n/2)
Step-by-step explanation:
9x²- n²/4
= (3x)²- (n/2)²
= (3x+ n/2)(3x- n/2) [a²-b²= (a+b)(a-b) ; a= 3x, b= n/2]
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