plz help me to answer the question,if you do not know the answer,plz answer no~I need the step~Thank for your help~
1)Simplify the following:
a)-(x/x+y)-(y/x+y)
b)(y/-y+x)-(x/x-y)
c)[7/12(b-1)]-[3/4(b-1)]
d)[2c/2(c-d)]-[d/8(c-d)]
F.2 maths
2007-09-30 8:19 am
回答 (3)
2007-09-30 8:29 am
✔ 最佳答案
-(x/x+y)-(y/x+y)=(-x-y)/(x+y)
=-(x+y)/(x+y)
=-1
(y/-y+x)-(x/x-y)
=y/(x-y)-x/(x-y)
=(y-x)/(x-y)
=-(x-y)/(x-y)
=-1
[7/12(b-1)]-[3/4(b-1)]
=7/12(b-1)-9/12(b-1)
=(7-9)/12(b-1)
=-2/12(b-1)
= - 1/(6b-6)
[2c/2(c-d)]-[d/8(c-d)]
=8c/8(c-d)-d/8(c-d)
=(8c-d)/8(c-d)
=(8c-d)/(8c-8d)
2007-09-30 8:59 pm
=(-x-y)/(x+y)
=-(x+y)/(x+y)
=-1
=y/(x-y)-x/(x-y)
=(y-x)/(x-y)
=-(x-y)/(x-y)
=-1
=7/12(b-1)-9/12(b-1)
=(7-9)/12(b-1)
=-2/12(b-1)
= - 1/(6b-6)
=8c/8(c-d)-d/8(c-d)
=(8c-d)/8(c-d)
=(8c-d)/(8c-8d)
希望幫到你
=-(x+y)/(x+y)
=-1
=y/(x-y)-x/(x-y)
=(y-x)/(x-y)
=-(x-y)/(x-y)
=-1
=7/12(b-1)-9/12(b-1)
=(7-9)/12(b-1)
=-2/12(b-1)
= - 1/(6b-6)
=8c/8(c-d)-d/8(c-d)
=(8c-d)/8(c-d)
=(8c-d)/(8c-8d)
希望幫到你
參考: me calculate
2007-09-30 8:33 am
a)-(x/x+y)-(y/x+y)
=(-x-y)/(x+y)
b)(y/-y+x)-(x/x-y)
=(y-x)/(x-y)
c)[7/12(b-1)]-[3/4(b-1)]
=(7-9)/[12(b-1)]
1/[6(b-1)]
d)[2c/2(c-d)]-[d/8(c-d)]
=(4c-d)/[8(c-d)]
=(-x-y)/(x+y)
b)(y/-y+x)-(x/x-y)
=(y-x)/(x-y)
c)[7/12(b-1)]-[3/4(b-1)]
=(7-9)/[12(b-1)]
1/[6(b-1)]
d)[2c/2(c-d)]-[d/8(c-d)]
=(4c-d)/[8(c-d)]
收錄日期: 2021-04-13 13:40:41
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