>
数学
>
270(x+15)-300x=x(x+15),
会的话做960(x+20)-960x=4x(x+20)
人气:448 ℃ 时间:2020-02-04 00:32:51
解答
270(x+15)-300x=x(x+15)
270X+4050-300X=X^2+15X
X^2+45X-4050=0
(X+90)(X-45)=0
X=-90或X=45
960(x+20)-960x=4x(x+20)
960X+19200-960X=4X^2+80X
4X^2+80X-19200=0
X^2+20X-4800=0
(X+80)(X-60)=0
X=-80或X=60
推荐
x-30%x=7,(1+35%)x=270%,15-10%x=1.解方程
15(62+x)=270-60 方程怎么解?
x+(x-140)+(x-210)=270 x=?
X(270-X)=9答案?
(x+10)+x/2=270 x=?
一个小数的小数点向左移动一位后就比原数小1.53,这个小数原来是_.
You can buy ( ) things in the stop?A .a lot B.a lots of C.a lots D.lots of
以马〕开头的成语
猜你喜欢
别人说welcome to china你怎么回答
关于生物与环境的关系准确的说法是什么
situation denies many businesses the credit they need to operate
帮忙用英文写一篇关于解决朋友之间矛盾的作文.
what parents do has a great——on their children
u开头的英语单词有哪些
My school is not far from here. It's only walk. 答案说是five minute,但个人认为是five minutes'
much 和more 在比较级上的用法区别
© 2024 79432.Com All Rights Reserved.
电脑版
|
手机版