化简:(x²-4x+4分之x²-4)-(x+2分之x-2)除x-2分之x再任选一个你喜欢的数代入求值 急
人气:104 ℃ 时间:2020-04-02 20:38:28
解答
很高兴为您(x²-4X+4分之x²-4+x+2分之2-x)除以x-2分之x [(x²-4)/(x²-4x+4)+(2-x)/(x+2)]÷[x/(x-2)]=[(x-2)(x+2)/(x-2)²+(2-x)/(x+2)]×(x-2)/x=[(x+2)/(x-2)+(2-x)/(x+2)]×(x-2)/x={[(x...=[(x-2)(x+2)/(x-2)²+(2-x)/(x+2)]×(x-2)/x ?={[(x+2)²-(x-2)²]/(x²-4)}×(x-2)/x ?=8x/[(x-2)(x+2)]*(x-2)/x?ԭʽ={(x+2)/(x-2)+(2-x)/(x+2)}x(x-2)/x=��x+2��\x-(x-2)^2/x(x+2) = 8x/x(x+2)==8/(x+2)还是不懂原式={(x+2)/(x-2)+(2-x)/(x+2)}x(x-2)/x=(x+2)\x-(x-2)^2/x(x+2)= 8x/x(x+2)==8/(x+2) 是什么的��һ������ԭʽ={(x+2)/(x-2)+(2-x)/(x+2)}x(x-2)/x=��x+2��\x-(x-2)^2/x(x+2)= 8x/x(x+2)==8/(x+2) �ǽ����ĵ�[(x-2)(x+2)/(x-2)²+(2-x)/(x+2)]×(x-2)/x 这个��={[(x+2)²-(x-2)²]/(x²-4)}��(x-2)/x ? =8x/[(x-2)(x+2)]*(x-2)/x?��={[(x+2)²-(x-2)²]/(x²-4)}×(x-2)/x =8x/[(x-2)(x+2)]*(x-2)/x =8/(x+2)=8x/[(x-2)(x+2)]*(x-2)/x=8/(x+2)都等于8/(x+2)。
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