ПЛИЗ СРОЧНО 1 ВАРИАНТ!!!!

Question

ПЛИЗ СРОЧНО 1 ВАРИАНТ!!!!

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Answer 1

1) 36x(2) - 25y(2) = (6x - 5y)(6x + 5y
2)x(2)y(4) - 1 = (xy(2) - 1)(xy(2) + 1)
3) 81 - 64x(2)y(2) = (9 - 8xy)(9 + 8xy)
6) (2a + 7b)\2 - (3a - 5b)\2 = (4a(2) + 49b(2)) - (9a(2) - 25b(2))