1.(2x+3)(3x-1) 2.(2a平方+a)(-3a-1)
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1.(2x+3)(3x-1) 2.(2a平方+a)(-3a-1)
1.(2x+3)(3x-1) 2.(2a平方+a)(-3a-1)
1.(2x+3)(3x-1) 2.(2a平方+a)(-3a-1)
原式=6x²-2x+9x-3=6x²+7x-3
原式=-6a²-2a-3a²-a=3a²-3a
a+x/x+1 ,x/x^2-2x-3 ,a/x^2+4x+3
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1.x²+3x/x²+2x -x²-4/x²+4x+4 2.a²/a+b-a+b 3.(1-1/a-2)÷3-a/2a-44.(x-1/y)÷(y-1/x) 5.3-x/x-4+1/4-x=1 6.x-2/x+2-1=3/x²-4 7.5/x-1=1/x+38.x+1/x-2+x+2/x-1=2
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x^2-x/x+1÷x/x+1 ;x^2+6x+9/x^2-9÷x+2/x-3;2/a÷4/a
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