1) 2a²b³=9 |×(-3) -6a²b³=-27;
2) 2a²b³=9 (2a²b³)²=9² 4a⁴b⁶=81 |÷2 2a⁴b⁶=81/2.
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1) 2a²b³=9 |×(-3) -6a²b³=-27;
2) 2a²b³=9 (2a²b³)²=9² 4a⁴b⁶=81 |÷2 2a⁴b⁶=81/2.