化简分式:2a2+3a+2a+1−a2−a−5a+2−3a2−4a−5a−2+2a2−8a+5a−3.
化简分式:
−
−
+
.
2a2+3a+2 |
a+1 |
a2−a−5 |
a+2 |
3a2−4a−5 |
a−2 |
2a2−8a+5 |
a−3 |
数学人气:827 ℃时间:2020-04-12 16:54:48
优质解答
2a2+3a+2a+1−a2−a−5a+2−3a2−4a−5a−2+2a2−8a+5a−3=(2a+1)+1a+1-(a-3)-1a+2-(3a+2)+1a−2+(2a-2)-1a−3=[(2a+1)-(a-3)-(3a+2)+(2a-2)]+(1a+1-1a+2+1a−2-1a−3)=1a+1-1a+2+1a−2-1a−3=1(a...
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