计算a+5/5a-20+5/a²-8a+16
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计算a+5/5a-20+5/a²-8a+16计算a+5/5a-20+5/a²-8a+16计算a+5/5a-20+5/a²-8a+16a+5/5a-20+5/a²
计算a+5/5a-20+5/a²-8a+16
计算a+5/5a-20+5/a²-8a+16
计算a+5/5a-20+5/a²-8a+16
a+5/5a-20+5/a²-8a+16
=(a+5)/5(a-4) +5/(a-4)²
=[(a+5)(a-4)+25]/5(a-4)²
=[a²-4a+5a-20+25]/5(a-4)²
=(a²+a+5)/5(a-4)²