2a+1分之2a 4a方-4a+1分之4(2a-1)

问题描述:

2a+1分之2a 4a方-4a+1分之4(2a-1)
通分 2a+1分之2a 和4a²-4a+1分之4(2a-1)

2a/(2a+1)
=2a(2a-1)/ [(2a+1)(2a-1)]
4(2a-1)/(4a²-4a+1)
=4(2a-1)/(2a-1)²
=4/(2a-1)
=4(2a+1)/[(2a+1)(2a-1)]