Question

3a+丨2a丨+丨b丨化简

当a＞0时,b＜0时,化简下列各式.
1.丨5-6丨+丨b-2a丨＋丨1＋二分之一a丨
2.丨6-5b丨-丨3a-2b丨-丨8b-1丨

Answer 1

1.丨5-6丨+丨b-2a丨＋丨1＋二分之一a丨
=1+(2a-b)+(1+a/2)=5a/2-b+2
2.丨6-5b丨-丨3a-2b丨-丨8b-1丨
=(6-5b)-(3a-2b)-(1-8b)=-3a+5b+5