factorize the following 9x²+6x+1-25y²
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9x²+6x+1-25y²
= (3x)²+(1)²+2(3x)(1)-25y²
(a+b)² = a²+b²+2ab
=(3x+1)²- (5y)²
=[3x+1+(-5y)] [3x+1-(-5y)]
=[3x+1-5y] [3x+1+5y] ans
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