化简x分之3+(x-1)分之2=(x²-x)分之(x+5)解方程化简:((a²-2a)分之(a+2)+(4-a²)分之8)÷a分之(a-2)
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![化简x分之3+(x-1)分之2=(x²-x)分之(x+5)解方程化简:((a²-2a)分之(a+2)+(4-a²)分之8)÷a分之(a-2)](/uploads/image/z/4342135-31-5.jpg?t=%E5%8C%96%E7%AE%80x%E5%88%86%E4%B9%8B3%2B%EF%BC%88x-1%EF%BC%89%E5%88%86%E4%B9%8B2%3D%EF%BC%88x%26%23178%3B-x%EF%BC%89%E5%88%86%E4%B9%8B%EF%BC%88x%2B5%EF%BC%89%E8%A7%A3%E6%96%B9%E7%A8%8B%E5%8C%96%E7%AE%80%EF%BC%9A%EF%BC%88%EF%BC%88a%26%23178%3B-2a%EF%BC%89%E5%88%86%E4%B9%8B%EF%BC%88a%2B2%EF%BC%89%2B%EF%BC%884-a%26%23178%3B%EF%BC%89%E5%88%86%E4%B9%8B8%EF%BC%89%C3%B7a%E5%88%86%E4%B9%8B%EF%BC%88a-2%EF%BC%89)
化简x分之3+(x-1)分之2=(x²-x)分之(x+5)解方程化简:((a²-2a)分之(a+2)+(4-a²)分之8)÷a分之(a-2)
化简
x分之3+(x-1)分之2=(x²-x)分之(x+5)解方程
化简:((a²-2a)分之(a+2)+(4-a²)分之8)÷a分之(a-2)
化简x分之3+(x-1)分之2=(x²-x)分之(x+5)解方程化简:((a²-2a)分之(a+2)+(4-a²)分之8)÷a分之(a-2)
1、由题意可知x≠1且x≠0
则方程x分之3+(x-1)分之2=(x²-x)分之(x+5)两边同乘以x²-x可得:
3(x-1)+ 2x=x+5
5x-1=x+5
4x=6
解得:x=2分之3
经检验,原方程的解为x=1又2分之1
2、[(a²-2a)分之(a+2)+(4-a²)分之8] ÷ a分之(a-2)
={[a(a-2)]分之(a+2)- [(a+2)(a-2)]分之8} × (a-2)分之a
=[a(a-2)(a+2)]分之[(a+2)²-8a] × (a-2)分之a
=[a(a-2)(a+2)]分之(a²-4a+4) × (a-2)分之a
=[(a-2)(a+2)]分之(a-2)² × (a-2)分之1
=(a+2)分之1
第一题:等号两边听、同乘以X的平方减一最后得4乘以X=8,X=2.
第二道题等于A+2分之一