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Ответ

Ответ дан
Sashapchel
Равно -28 так как (x+5)(x-5) равно x2-25

Ответ

Ответ дан
tretyaakovva

Ответ:

-28

Объяснение:

-х(х+7)+(х+5)(х-5)= -7х - 25.Если х = 3/7 тогда - 7х - 25 = (-7) × 3/7 - 25 = - 28

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