factorise - 25x^4 - 60x^2 y^2 + 36y^4
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Answer:
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it is so simple
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Answered by
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25x^4 -2(5x^2)(6y^2) + 36y^4
USING FORMULA:
a^2-2ab+b^2=(a-b)^2
hence
ANSWER=
(5x^2-6y^2)
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