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f(x,y)=3(x+y)+32xy f(x,y)=3(x+y)-32xy f(x,y)=3(x+y)-16xy f(x,y)=3(x+y)+16xy
f(x,y)=3(x+y)+32xy f(x,y)=3(x+y)-32xy f(x,y)=3(x+y)-16xy f(x,y)=3(x+y)+16xy
47XX(XY),+21 16XY(XX),-14,+t(14q,21q) 46XX(XY)/47,XY(XX),+21 46XX(XY),-21,+t(21q21q) 46XX(XY),-22,+t(21q22q)
4xy+xy=5xy x+2x=2x² 5xy-3xy=2 x+y=xy
f(x,y)=3(x+y)+32xy f(x,y)=3(x+y)-32xy f(x,y)=3(x+y)-16xy f(x,y)=3(x+y)+16xy
f(x,y)=3(x+y)+32xy f(x,y)=3(x+y)-32xy f(x,y)=3(x+y)-16xy f(x,y)=3(x+y)+16xy
MRCS1xy=MRCS2xy MRTS1xy=MRTS2xy MRTSxy=Px/Py MRTS1xy=MRCS2xy
12xy-4x 12xy-10x 12xy-8x 12xy-2x
x2 –2xy+y2=x(x-2y)+y2 x2-16y2=(x+8y)(x-8y)
x2+xy+y2=(x+y)2 x4y4-1=(x2y2+1)(xy+1)(xy-1)
3m﹣m=2 a2b﹣ab2=0 xy﹣2xy=﹣xy 2x+2y=5xy
3m﹣m=2 a2b﹣ab2=0 2x+3y=5xy xy﹣2xy=﹣xy
f(x,y)=3(x+y)+32xy f(x,y)=3(x+y)-32xy f(x,y)=3(x+y)-16xy f(x,y)=3(x+y)+16xy
f(x,y)=3(x+y)+32xy f(x,y)=3(x+y)-32xy f(x,y)=3(x+y)-16xy f(x,y)=3(x+y)+16xy
46,XY(或XX),-16,+t(16q21q) 46,XY(或XX),-14,+t(14q21q) 46,XY(或XX),-17,+t(17q21q) 46,XY(或XX),-20,+t(20q21q) 46,XY(或XX),-23,+t(23q22q)
-x2-y2 = -(x+y)(x-y) x2y+2xy+4y = y(x+2)2 -49x2+x2y2 = (xy+7x)(xy-7x) 16x2+4y2-16xy = 4(2x-y)2