factorise : 25a²+5a/2b+ 1/16b²
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Step-by-step explanation:
A^2-b^2
=(a+b)(a-b)
<(5a-3b)+4b><(5a-3b)-4b>
=(5a-3b+4b)(5a-3b-4b)
=(5a+b)(5a-7b)
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