Ответ:
(2c+5)²=4c²+20c+25
(3a-1/3b)²= 9a²-2ab+1/9b²
(-0.9x-0.1y)²= 0.81x²-0.18xy-0.01y²
(5x-3)³=125x³-225x²+135x-27
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Ответ:
(2c+5)²=4c²+20c+25
(3a-1/3b)²= 9a²-2ab+1/9b²
(-0.9x-0.1y)²= 0.81x²-0.18xy-0.01y²
(5x-3)³=125x³-225x²+135x-27