(56-18t⁶)²=56²-2*56*18t⁶+18²t¹²=3136-2016t⁶+324t¹²
по формуле (а-к)²=а²-2ак+к²
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(56-18t⁶)²=56²-2*56*18t⁶+18²t¹²=3136-2016t⁶+324t¹²
по формуле (а-к)²=а²-2ак+к²