ПОМОГИТЕ СРОЧНО НАДО
упростите выражение
3n² -n (4n-6m)
5a+2a(3a+5)
a(a+b)-b(a-b)
2x(x-y)-y(y--2x)
2p(1 -p-3p²)-3p(2-p-2p²)
2c (5a-3c² )-c(a-6c²)+3a(9a-c)
раскройте скобки
с(2а+b )
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