(25m^2 - 16n^2 /(5m - 4n)
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(i) 25m2 – 16n2 = (5m)2 – (4n)2 = (5m – 4n) (5m + 4n) [∵ a2 – b2 = (a – b)(a + b)] (ii) x4 – 9x2 = x2(x2 – 9) = x2(x2 – 32) = x2(x – 3)(x + 3)Read more on Sarthaks.com - https://www.sarthaks.com/967070/factorise-the-following-i-25m-2-16n-2-ii-x-4-9x-2
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