Question

выполнить умножение:(5а-3b)(3b+5а)
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Answer 1

$\boxed{ {a}^{2} - {b}^{2} = (a + b)(a - b) }$

$(5a - 3b)(3b + 5a) = (5a - 3b)(5a + 3b) = {(5a)}^{2} - {(3b)}^{2} = \boldsymbol{25 {a}^{2} - 9 {b}^{2} }$