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Известно, что
(2х+а)(х-3)=2х(во 2 степени)-х-3а
Найдите значения а и вычислите значения выражения
2х(во 2 степени)-х-3а
а)12
б)-12
в)-8
г)8-
Предмет:
Математика -
Автор:
david564 - 5 лет назад
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Ответы 2
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А теперь?
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Автор:
sean953 - 5 лет назад
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0
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(2x+a)(x−3)=2x^2−x−3ax=−1(a−2)(−4)=2+1−3a−4a+8=3−3aa=52x^2−x−3a=2+1−15=−12
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Автор:
alondractgn - 5 лет назад
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0
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