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Ку7метр
@Ку7метр
July 2022
2
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Найдите значение выражения (2а-5)^2 +а(20 -5а) при а = -2/5
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MizoriesKun
(2а-5)²+а (20-5а)=4а²-20а+25+20а-5а²=-а²+25=-(-2/5)²+25=-4/25+25=24 21/25=24,84
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Thanks 3
natali15medved
Verified answer
4а²-20а+25+20а-5а²=25-а²
25-(2/5)²=25-4/25=24 21/25
5 votes
Thanks 5
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Verified answer
4а²-20а+25+20а-5а²=25-а²25-(2/5)²=25-4/25=24 21/25