2X+4分之3-4-X²分之6+X-2分之1 化简 25
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解:原式=3/(2x+4)-6/(4-x²)+1/(x-2)
=3/[2(x+2)]+6/(x²-4)+1/(x-2)
=[3×2(x-2)]/[2(x+2)(x-2)]+(6×2)/[2(x+2)(x-2)]+[2(x+2)]/[2(x+2)(x-2)]
=(6x-12)/[2(x+2)(x-2)]+12/[2(x+2)(x-2)]+(2x+4)/[2(x+2)(x-2)]
=(6x-12+12+2x+4)/[2(x+2)(x-2)]
=(8x+4)/[2(x+2)(x-2)]
=[2(4x+2)]/[2(x+2)(x-2)]
=(4x+2)/(x²-4)
=3/[2(x+2)]+6/(x²-4)+1/(x-2)
=[3×2(x-2)]/[2(x+2)(x-2)]+(6×2)/[2(x+2)(x-2)]+[2(x+2)]/[2(x+2)(x-2)]
=(6x-12)/[2(x+2)(x-2)]+12/[2(x+2)(x-2)]+(2x+4)/[2(x+2)(x-2)]
=(6x-12+12+2x+4)/[2(x+2)(x-2)]
=(8x+4)/[2(x+2)(x-2)]
=[2(4x+2)]/[2(x+2)(x-2)]
=(4x+2)/(x²-4)
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=3/2(X+2) +6/(X+2)(X-2)+1/(X-2)
=[3(X-2)+6+2(X+2)]/2(X+2)(X-2)
=(5X+4)/2(X+2)(X-2)
=[3(X-2)+6+2(X+2)]/2(X+2)(X-2)
=(5X+4)/2(X+2)(X-2)
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3x-15/4-6/x
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