变态的因式分解!I need you
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变态的因式分解!I need you
变态的因式分解!I need you
变态的因式分解!I need you
2、
∵a+1/b=1;b+2/c=1
∴a=1-1/b=(b-1)/b;c=2/(1-b)
∴c+2/a
=2/(1-b)+2/[(b-1)/b]
=2/(1-b)-2b/(1-b)
=(2-2b)/(1-b)
=2(1-b)/(1-b)
=2
3、x²+x-3=0
x²+x=3
∴(3-x²-x³)/(x-1)
=[3-x(x+²)]/(x-1)
=(3-3x)/(x-1)
=-3(x-1)/(x-1)
=-3
变态的因式分解!I need you
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