а) 3(p²+2pq+q²)=3(p+q)²
б)-(b²-2bc+c²)=-(b-c)²
в)9(9-6b+b²)=9(3-b) ²
г)2x(b²+4b+4)=2x(b+2)²
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а) 3(p²+2pq+q²)=3(p+q)²
б)-(b²-2bc+c²)=-(b-c)²
в)9(9-6b+b²)=9(3-b) ²
г)2x(b²+4b+4)=2x(b+2)²