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精子:AXB、aXB 精子:AXB、aXB、AY、aY 卵细胞:AXB、aXB 卵细胞:AXB、aXB、AY、aY
-2ab2+4a2b=2ab(-b+2a) 3m(a-b)-9n(b-a)=3(a-b)(m+3n) -5ab+15a2bx+25ab3y=-5ab(-3ax-5b2y); 3ay2-6ay-3a=3a(y2-2y-1)
精子:AXB,aXB 精子:AXB,aXB,AY,aY 卵细胞:AXB,aXB 卵细胞:AXB,aXB,AY,aY
x=y 3﹣ax=3﹣ay ay=﹣ax ax+1=ay﹣1
(x+2)(x-2)= —4 12ab=3a••4ab 4x—8x—1 = 4x(x—2)—1 2ax—2ay = 2a(x—y)
x=y ax+1=ay+1 4ax=4ay 3-ax=3-ay
精子:AXB,aXB 精子:AXB,aXB,AY,aY 卵细胞:AXB,aXB 卵细胞::AXB,aXB,AY,aY
x=y ax+1=ay﹣1 ax=﹣ay 3﹣ax=3﹣ay
x=y ax+1=ay﹣1 ax=﹣ay 3﹣ax=3﹣ay
(2ax-10ay)+(5by-bx) (2ax-bx)+(5by-10ay) (x2-y2)+(ax+ay) (x2+ax)-(y2-ay)
x=y ax+1=ay﹣1 ax=﹣ay 3﹣ax=3﹣ay
bx+ay+c=0 ax-by+c=0 bx+ay-c=0 bx-ay+c=0
b+ax=b+ay x=y x﹣ax=x﹣ay =
精子:AXB,aXB 精子:AXB,aXB,AY,aY 卵细胞:AXB,aXB 卵细胞::AXB,aXB,AY,aY