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edinorog28
@edinorog28
July 2022
1
5
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помогите!!!! алгебра 7 класс...
примеры:
а) (х-3)*(х-7)-2х(3х-5)=?
б) 4а(а-2)-(а-4)²=?
в)2(m+1)W-4=?
помогите пожалуйста, даю 15 баллов
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Answers & Comments
Kolledgan
А) x²-7x-3x+21-6x²+10x= -5x²
б) 4a²-8a-(a²-8a+16)= 4a²-8a-a²+8a-16= 3a²-16в) 2(m+1)² -4m = 2(m²+2m+1) - 4m = 2m²+4m+2= 2m² + 2
1 votes
Thanks 1
Kolledgan
-m
Kolledgan
-4m пропустил в
Kolledgan
Но будем считать что я сразу отнял
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Answers & Comments
б) 4a²-8a-(a²-8a+16)= 4a²-8a-a²+8a-16= 3a²-16в) 2(m+1)² -4m = 2(m²+2m+1) - 4m = 2m²+4m+2= 2m² + 2