September 2021 1 7 Report
Вынесите за скобки общий множитель.
7. (x-y)²-a(y-x)
8. -3b(b-2)+7(b-2)²
9. 3a(2x-7)+5b(7-2x)
10. 12a²b-18ab²-30ab³​
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