Question

(х-5)^2-(х-7)(х+7) срочно
упростите выражение

Answer 1

$\\ {(x - 5)}^{2} - (x - 7)(x + 7) = {x}^{2} - 10x + 25 - ( {x}^{2} - 49) = \\ = - 10x + 74$