(32-2x)x=120 (x+3)^2=-x(x+5)
(32-2x)x=120 (x+3)^2=-x(x+5)
两个方程
两个方程
数学人气：484 ℃时间：2020-02-03 14:15:44
优质解答
(32-2x)x=120 32x-2x^2=120x^2-16x+60=0(x-10)(x-6)=0x-10=0 x-6=0x1=10 或 x2=6(x+3)^2=-x(x+5) x^2+6x+9=-x^2-5x2x^2+11x+9=0(2x+9)(x+1)=02x+9=0x+1=0x1=-9/2或者x2=-1
我来回答
类似推荐
猜你喜欢
- 1You ____ your homework in such a hurry .You can have a rest.如题
- 2求代数式-m的平方+3m+4分之3的最小值
- 3已知向量a ＝（2,3）,向量b ＝（6,x）,且a 平行b ,则x
- 4定语从句中,the only one of 后是否可以加who引导定语从句
- 51吨的7分之6和( )吨的7分之1相等
- 6一道物理题....自由落体运动的...
- 7how old is your (old) brother 怎么填
- 8Life was different in Chink many yeays ago.翻译成汉语
- 9某年,李叔叔把5000元钱存入银行,如果整存整取2年,到期后取出本金和利息共5256.5元
- 10How can I possibly answer such a question