factorise:(5a+1/3)2-(2a-1/3)2
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multiply 2 inside...
10a + 2/3 - 4a +2/3
6a + 4/3
2(3a + 2/3)....
10a + 2/3 - 4a +2/3
6a + 4/3
2(3a + 2/3)....
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Answer:
multipy (2a-1/3)(2a+1/3)
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