2,4,6,8 решите пож.та

Question

2,4,6,8 решите пож.та

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Answer 1

4c^2-49d^2=(2c-7d)(2c+7d)
x^2y^2-0,04=(xy-0.2)(xy+0.2)
144-49n2=(12-7n)(12+7n)
p^2q^2-4k^2=(pq-2k)(pq+2k)