=3-2(x+2y)
=3-2x3
=3-6
=-3
已知x+2y=3.求代數(shù)式3-2x-4y的值
已知x+2y=3.求代數(shù)式3-2x-4y的值
數(shù)學(xué)人氣：715 ℃時(shí)間：2019-11-07 16:09:33
優(yōu)質(zhì)解答
我來(lái)回答
類似推薦
- 已知代數(shù)式x+2y的值是3，則代數(shù)式2x+4y+1的值是（ ?。?A.1 B.4 C.7 D.9
- 已知代數(shù)式x+2y+1的值是3，則代數(shù)式2x+4y+1的值是（ ?。?A.4 B.5 C.7 D.不能確定
- 已知代數(shù)式x-2y的值是3，則代數(shù)式2x+1-4y值是_
- 已知代數(shù)式x+2y的值是3,則代數(shù)式1-2x-4y的值是
- 已知：x-2y+3=0，則代數(shù)式（2y-x）2-2x+4y-1的值為（ ） A.5 B.14 C.13 D.7
- 函數(shù)f(x)=sinx-cosx^2的最小值是?
- 英語(yǔ)翻譯
- I took my grandpa to the hospital this morning,_____ I missed the first class.
- So crazy
- 方差是各個(gè)數(shù)據(jù)與平均數(shù)之差的平方的平均數(shù)
- 函數(shù)y=f(x)與它反函數(shù)y=f^-1(x)怎么讀?
- These are photos of my families.Look at them 改錯(cuò)
猜你喜歡
- 1平面與平面重合,是否屬于平行一類?那重合的兩直線,也屬于平行一類的嗎?
- 2非洲每年因饑餓死亡的人數(shù)及現(xiàn)在饑餓人口數(shù)量拜托各位了 3Q
- 3decide to do sth.還=什么
- 4(7/8)o you think of london?B:5.____london is one of the liveliest cities
- 5啤酒可以托運(yùn)嗎
- 6邊長(zhǎng)為2√6的等邊三角形的中心到一邊的距離為?
- 7please give your hand to help me
- 8已知2的X次方等于3的Y次方等于6的Z次方不等等于1,證明X分之一加Y分之一等于Z分之一.
- 9幫我做做?
- 10機(jī)械分析天平TG628A的使用說(shuō)明書(shū)
- 11in winter ,we wear warm coats to protect our bodies_.
- 12( )was most importance to her ,she told me,was her family it this what as