方程-2(x+1)=3,变形为﹣2x-2=3,这种变形叫-_______,理论依据是__________.
别看错了,
人气:216 ℃ 时间:2020-04-03 16:22:21
解答
去括号,乘法分配律
推荐
- 方程-2(x+3)=3可变形为-2x-2=3,这种变形叫( ),他的理论依据是(
- 将方程2x-3=x+4,将移项得2x-x=4+3,此变形中方程的两边同时加上了______
- 在方程2X+1=X-1两边都加上_______,可变形为X=-2
- 用换元法解方程:[8(x^2+2x)/x^2-1]+[3(x^2-1)/x^2+2x]=11,可设y=_______,则原方程变形为______________
- 下列各式都由方程x+3-2x=-2x-1变形得到,其中变形正确的是
- to his surprise ,this time there were six .
- 用形容词的适当形式填空 In this country it's very ------(cold)in November,and it's much
- he stepped into the room quietly without being noticed.后面的without being noticed是什么意思?
猜你喜欢