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алина3391
@алина3391
June 2022
2
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помогите до звонка 20 минут пожалуйста не могу решить !!!!
3•(4m-6n)-4•(5m+2n) и найдите значение при m=2; n=-1
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Answers & Comments
bam90
3*(4*2-6*(-1))-4(5*2+2*(-1))= 3*(8+6)-4(10-2) =(3*14)-(4*8)=42-32=10
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Pacanka202
12m–18n–20m–8n = –8m–26n =
= –2(4m+13n) = –2(4•2–13•1) = 10
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= –2(4m+13n) = –2(4•2–13•1) = 10