
(1).-(x+2)²+16(x-1)²=[4(x-1)]²-(x+2)²=[4(X-1)+(X+2)][4(X-1)-(X+2)]=3(5X-2)(X-2)(2).-2a²x²+16a²x-32a²=-2(a²x²-8a²x+16a²)=-2(ax-4a)²(3).a²-2a+1-b² =(a²-2a+1)-b²=(a-1)²-b²=(a-b-1)(a+b-1)

(1).-(x+2)²+16(x-1)²=[4(x-1)]²-(x+2)²=[4(X-1)+(X+2)][4(X-1)-(X+2)]=3(5X-2)(X-2)(2).-2a²x²+16a²x-32a²=-2(a²x²-8a²x+16a²)=-2(ax-4a)²(3).a²-2a+1-b² =(a²-2a+1)-b²=(a-1)²-b²=(a-b-1)(a+b-1)