将X2-7X+12=0变形为A(X+M)2+N是将-2X2+4X-18变形为A(X+M)2+N

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将X2-7X+12=0变形为A(X+M)2+N是将-2X2+4X-18变形为A(X+M)2+N
将X2-7X+12=0变形为A(X+M)2+N
是将-2X2+4X-18变形为A(X+M)2+N

将X2-7X+12=0变形为A(X+M)2+N是将-2X2+4X-18变形为A(X+M)2+N
(X-3.5)2+39/4