25(a+2b)2 -36 (2a-5b)2 = 52 (a+2b)2 -62 (2a-5b)2 = 5 a+2b 2 - 6 2a-5b2 = 5 a+2b +6 2a-5b 5 a+2b -6 2a-5b = (5a+10b + 12a-30b) (5a+ 10b - 12a +30b) = (17a – 20b) (40b - 7a) answer
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