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sashastyles03
@sashastyles03
August 2022
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Найдите значение дробей:
а) 48^2-45^2
———————
74^2-19^2
б) 88^2-53^2
———–——–——
20^2-15^2
(^2-степень)
Заранее спасибо!))
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Answers & Comments
litanalove
A² -b² =(a -b)(a +b)
1) (48² -45²) / (74² -19²) = (48 -45)(48 +45) / (74 -19)(74 +19) = 3*93 / 55*93 =
=3/55
2) (88 -53)(88 +53) / (20 -15)(20 +15) =35*141 / 5*35 = 141/5 =28.2
17 votes
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Answers & Comments
1) (48² -45²) / (74² -19²) = (48 -45)(48 +45) / (74 -19)(74 +19) = 3*93 / 55*93 =
=3/55
2) (88 -53)(88 +53) / (20 -15)(20 +15) =35*141 / 5*35 = 141/5 =28.2