【数学化简求值】(x-2)×(x²-4)分之2x+(x+2)分之4【数学化简求值】(x-2)×(x²-4)分之2x+(x+2)分之4【1-(x-1)分之1】÷(x²-2x-1)分之(x²-4)x=-1【分式方程】3/x-2 + 1/2-x
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【数学化简求值】(x-2)×(x²-4)分之2x+(x+2)分之4【数学化简求值】(x-2)×(x²-4)分之2x+(x+2)分之4【1-(x-1)分之1】÷(x²-2x-1)分之(x²-4)x=-1【分式方程】3/x-2 + 1/2-x
【数学化简求值】(x-2)×(x²-4)分之2x+(x+2)分之4
【数学化简求值】
(x-2)×(x²-4)分之2x+(x+2)分之4
【1-(x-1)分之1】÷(x²-2x-1)分之(x²-4)
x=-1
【分式方程】
3/x-2 + 1/2-x = 1
x-2/x+2 = 1 - 4/x²-4
【数学化简求值】(x-2)×(x²-4)分之2x+(x+2)分之4【数学化简求值】(x-2)×(x²-4)分之2x+(x+2)分之4【1-(x-1)分之1】÷(x²-2x-1)分之(x²-4)x=-1【分式方程】3/x-2 + 1/2-x
=(x-2)×2x/(x+2)(x-2)+4/(x+2)
=2x/(x+2)+4/(x+2)
=(2x+4)/(x+2)
=2
2、(x-1-1)/(x-1) ×(x-1)²/(x+2)(x-2)
=(x-2)/(x-1) ×(x-1)²/(x+2)(x-2)
=(x-1)/(x+2)
3 、两边乘以(x-2)得
3-1=x-2
x=4
检验:x=4是方程的解
4、两边乘以(x+2)(x-2)得
x²-4x+4=x²-4-4
-4x=-12
x=3
检验:x=3是方程的解