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Question
Factorise: `4/25 - 25b^2`
Sum
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Solution
`4/25 - 25b^2`
= `(2/5)^2 - (5b)^2`
= `(2/5 + 5b)(2/5 - 5b)` ....[a2 – b2 = (a + b) (a – b)]
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Factorisation by Difference of Two Squares
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