数学计算:http://zhidao.baidu.com/question/408628011.html?quesup2&oldq=1
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=(2x²/4x)*(9y²/3y)
=x/2*3y
=3xy/2
=a/a(a+1)+1/a(a+1)
=(a+1)/a(a+1)
=1/a
=(x+2)²/(x+2)(x-2)*(x-2)/(x+2)-x
=1-x
=1-1
=0
5(x-2)=3x
5x-10=3x
2x=10
x=5
经检验,x=5是方程的解
两边乘(x+3)(x-3)
x-3+6=0
x=-3
经检验,x=-3时分母x+3=0,增根,舍去
方程无解
=x/2*3y
=3xy/2
=a/a(a+1)+1/a(a+1)
=(a+1)/a(a+1)
=1/a
=(x+2)²/(x+2)(x-2)*(x-2)/(x+2)-x
=1-x
=1-1
=0
5(x-2)=3x
5x-10=3x
2x=10
x=5
经检验,x=5是方程的解
两边乘(x+3)(x-3)
x-3+6=0
x=-3
经检验,x=-3时分母x+3=0,增根,舍去
方程无解
参考资料: http://zhidao.baidu.com/question/408628011.html?quesup2&oldq=1
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