作业帮X²-X-2=0,则(X²-X+2√3)/[(X²-X)²-1+√3]=?A2√3/3 B√3/3 C√3 D√3/3或√3
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![X²-X-2=0,则(X²-X+2√3)/[(X²-X)²-1+√3]=?A2√3/3 B√3/3 C√3 D√3/3或√3](/uploads/image/z/1253146-58-6.jpg?t=X%26%23178%3B-X-2%3D0%2C%E5%88%99%28X%26%23178%3B-X%2B2%E2%88%9A3%29%2F%5B%28X%26%23178%3B-X%29%26%23178%3B-1%2B%E2%88%9A3%5D%3D%3FA2%E2%88%9A3%2F3+B%E2%88%9A3%2F3+C%E2%88%9A3+D%E2%88%9A3%2F3%E6%88%96%E2%88%9A3)
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X²-X-2=0,则(X²-X+2√3)/[(X²-X)²-1+√3]=?A2√3/3 B√3/3 C√3 D√3/3或√3
X²-X-2=0,则(X²-X+2√3)/[(X²-X)²-1+√3]=?
A2√3/3 B√3/3 C√3 D√3/3或√3
X²-X-2=0,则(X²-X+2√3)/[(X²-X)²-1+√3]=?A2√3/3 B√3/3 C√3 D√3/3或√3
[x²-x+2√3]/[(x²-x)²-1+√3]
=[x²-x-2+2+2√3]/[(x²-x-2+2)²-1+√3]
=[0+2+2√3]/[(0+2)²-1+√3]
=(2+2√3)/(3+√3)
去分母,同乘（3-√3）
=[(2+2√3)（3-√3）]/[(3+√3)（3-√3）]
=4√3/6
=2√3/3