Question

Решите пожалуйста . (7m-10n)(7m+10n)-100n^{2}

Answer 1

(7m-10n)(7m+10n)-100n^2=49m^2-100n^2-100n^2=49m^2-200n^2

Answer 2

To simplify the expression, we can use the distributive property of multiplication:

(7m - 10n)(7m + 10n) - 100n^2 = (7m)^2 - (10n)^2 + (7m)(10n) - (7m)(10n) - 100n^2 = 49m^2 - 100n^2

Therefore, the simplified expression is 49m^2 - 100n^2.