3x(x^2+4x+4)-x(x-3)(3x+4)怎么做,
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3x(x^2+4x+4)-x(x-3)(3x+4)怎么做,3x(x^2+4x+4)-x(x-3)(3x+4)怎么做,3x(x^2+4x+4)-x(x-3)(3x+4)怎么做,=3X³+12X
3x(x^2+4x+4)-x(x-3)(3x+4)怎么做,
3x(x^2+4x+4)-x(x-3)(3x+4)怎么做,
3x(x^2+4x+4)-x(x-3)(3x+4)怎么做,
=3X³+12X²+12X-X(3X²+4X-3X-12)
=3X³+12X²+12X-3X³-4X²+3X²+12X
=11X²+24X
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3x(x^2+4x+4)-x(x-3)(3x+4)怎么做,
(1)(2x/x-1)-(x-1/x)=1 (2)(x^2-4x/x^2-1)+1=2x/x+1 (3)(x+4/x^2+2x)-(1/x+2)=(2/x)+1
(1)(2x/x-1)-(x-1/x)=1 (2)(x^2-4x/x^2-1)+1=2x/x+1 (3)(x+4/x^2+2x)-(1/x+2)=(2/x)+1