а) 2b⁴(4a²+4ab+b²)= 2b⁴(2a+b)*(2a+b)
г) 81c²-(d²-16dk+64k²)= 81c²-(d-8k)²= (9c-d+8k)(9c+d-8k)
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а) 2b⁴(4a²+4ab+b²)= 2b⁴(2a+b)*(2a+b)
г) 81c²-(d²-16dk+64k²)= 81c²-(d-8k)²= (9c-d+8k)(9c+d-8k)