Factorize : (9x-1/5)^2 -(x+1/3)^2
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a^2-b^2=(a+b)(a-b)
(9x-1/5+x+1/3)(9x-1/5-x-1/3)
(10x-3+5/15)(8x-3-5/15)
(10x+2/15)(8x-8/15)
2(5x+1/15)8(x-15)
I think this is the answer