Дано:A=8m-12n;B=3n-7m+4.Запишите выражение. 1.B-A 2.A+B 3.2A+3B 4.A*B 5.A/B 6.A/(A-B). Created by kstreltsova. matematika-ru

(A-B)...

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Дано:A=8m-12n;B=3n-7m+4.Запишите выражение.
1.B-A
2.A+B
3.2A+3B
4.A*B
5.A/B
6.A/(A-B)

Answers & Comments

torreses 1)3n-7m+4-8m+12n=15n-15m+4
2)8m-12n+3n-7m+4=m-9n+4
3)16m-24n+9n-21m+12=-5m-15n+12
4)24mn-56m^2+48m-36n^2+84mn-48n=-56m^2+48m+108mn+48n-36n^2
5)-7/8-4+1/4=-37/8
6)8-12n/15m-15n-4=8/15+12/15-1/4=13/12

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