5(х²-у²)=5(х-у)(х+у)
-3(а²-4)=-3(а-2)(а+2)
3(х²-25)=3(х-5)(х+5)
8(а²+2а+1)=8(а+1)²
-3(х²-4х+4)=-3(х-2)²
-(b²+10ab+5a²)=-(b+5a)²
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5(х²-у²)=5(х-у)(х+у)
-3(а²-4)=-3(а-2)(а+2)
3(х²-25)=3(х-5)(х+5)
8(а²+2а+1)=8(а+1)²
-3(х²-4х+4)=-3(х-2)²
-(b²+10ab+5a²)=-(b+5a)²