Question

1) (5m + 3n) (5m - 3n)​

Answer 1

answer in the attachment

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Answer 2

$\pink{(5m + 3n)(5m - 3n)} \\ \\ 5m(5m−3n) + 3n(5m−3n) \\ \\ 25 {m}^{2} - 15 mn + 15mn - 9 {n}^{2} \\ \\ 25 {m}^{2} - 9 {n}^{2} \\ \\ </p><p>\pink{now \: \: \: we \: \: \: \: know \: \: \: that}</p><p> \\ \\ \blue {(x + y)(x - y) = {x}^{2} - {y}^{2} }$

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