总述:本次共解1题。其中
☆方程1题
〖 1/1方程〗
作业:求方程 [(4x-8)/(x-4)]*[(4x-8)/(x-4)]+x*x = (5x-20)*(5x-20) 的解.
题型:方程
解:原方程:| | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | + | x | x | = | ( | 5 | x | − | 20 | ) | ( | 5 | x | − | 20 | ) |
去掉方程左边的一个括号:
| | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | × | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | + | x | x | = | ( | 5 | x | − | 20 | ) | ( | 5 | x | − | 20 | ) |
去掉方程右边的一个括号:
| | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | × | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | + | x | x | = | 5 | x | ( | 5 | x | − | 20 | ) | − | 20 | ( | 5 | x | − | 20 | ) |
| | ( | 4 | x | − | 8 | ) | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | + | x | x | ( | x | − | 4 | ) | = | 5 | x | ( | 5 | x | − | 20 | ) | ( | x | − | 4 | ) | − | 20 | ( | 5 | x | − | 20 | ) | ( | x | − | 4 | ) |
去掉方程左边的一个括号:
| | 4 | x | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | − | 8 | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | + | x | x | ( | x | − | 4 | ) | = | 5 | x | ( | 5 | x | − | 20 | ) | ( | x | − | 4 | ) | − | 20 | ( | 5 | x | − | 20 | ) | ( | x | − | 4 | ) |
去掉方程右边的一个括号:
| | 4 | x | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | − | 8 | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | + | x | x | ( | x | − | 4 | ) | = | 5 | x | × | 5 | x | ( | x | − | 4 | ) | − | 5 | x | × | 20 | ( | x | − | 4 | ) | − | 20 | ( | 5 | x | − | 20 | ) | ( | x | − | 4 | ) |
方程化简为:
| | 4 | x | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | − | 8 | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | + | x | x | ( | x | − | 4 | ) | = | 25 | x | x | ( | x | − | 4 | ) | − | 100 | x | ( | x | − | 4 | ) | − | 20 | ( | 5 | x | − | 20 | ) | ( | x | − | 4 | ) |
去掉方程左边的一个括号:
| | 4 | x | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | − | 8 | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | + | x | x | ( | x | − | 4 | ) | = | 25 | x | x | ( | x | − | 4 | ) | − | 100 | x | ( | x | − | 4 | ) | − | 20 | ( | 5 | x | − | 20 | ) | ( | x | − | 4 | ) |
去掉方程右边的一个括号:
| | 4 | x | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | − | 8 | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | + | x | x | ( | x | − | 4 | ) | = | 25 | x | x | x | − | 25 | x | x | × | 4 | − | 100 | x | ( | x | − | 4 | ) | − | 20 |
方程化简为:
| | 4 | x | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | − | 8 | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | + | x | x | ( | x | − | 4 | ) | = | 25 | x | x | x | − | 100 | x | x | − | 100 | x | ( | x | − | 4 | ) | − | 20 | ( | 5 | x | − | 20 | ) |
| | 4 | x | ( | 4 | x | − | 8 | ) | − | 8 | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | ( | x | − | 4 | ) | + | x | x | ( | x | − | 4 | ) | ( | x | − | 4 | ) | = | 25 | x | x | x | ( | x | − | 4 | ) | − | 100 | x | x | ( | x | − | 4 | ) | − | 100 | x | ( | x | − | 4 | ) |
去掉方程左边的一个括号:
| | 4 | x | × | 4 | x | − | 4 | x | × | 8 | − | 8 | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | ( | x | − | 4 | ) | + | x | x | = | 25 | x | x | x | ( | x | − | 4 | ) | − | 100 | x | x | ( | x | − | 4 | ) | − | 100 | x | ( | x | − | 4 | ) |
去掉方程右边的一个括号:
| | 4 | x | × | 4 | x | − | 4 | x | × | 8 | − | 8 | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | ( | x | − | 4 | ) | + | x | x | = | 25 | x | x | x | x | − | 25 | x | x | x | × | 4 | − | 100 | x |
方程化简为:
| | 16 | x | x | − | 32 | x | − | 8 | ( | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | ) | ( | x | − | 4 | ) | + | x | x | ( | x | − | 4 | ) | ( | x | − | 4 | ) | = | 25 | x | x | x | x | − | 100 | x | x | x | − | 100 | x | x |
去掉方程左边的一个括号:
| | 16 | x | x | − | 32 | x | − | 8 | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | × | ( | x | − | 4 | ) | + | x | x | ( | x | − | 4 | ) | = | 25 | x | x | x | x | − | 100 | x | x | x | − | 100 | x | x |
去掉方程右边的一个括号:
| | 16 | x | x | − | 32 | x | − | 8 | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | × | ( | x | − | 4 | ) | + | x | x | ( | x | − | 4 | ) | = | 25 | x | x | x | x | − | 100 | x | x | x | − | 100 | x | x |
方程化简为:
| | 16 | x | x | − | 32 | x | − | 8 | ( | 4 | x | − | 8 | ) | ÷ | ( | x | − | 4 | ) | × | ( | x | − | 4 | ) | + | x | x | ( | x | − | 4 | ) | = | 25 | x | x | x | x | − | 100 | x | x | x | − | 100 | x | x |
| | 16 | x | x | ( | x | − | 4 | ) | − | 32 | x | ( | x | − | 4 | ) | − | 8 | ( | 4 | x | − | 8 | ) | ( | x | − | 4 | ) | + | x | x | = | 25 | x | x | x | x | ( | x | − | 4 | ) | − | 100 | x | x | x | ( | x | − | 4 | ) | − | 100 |
去掉方程左边的一个括号:
| | 16 | x | x | x | − | 16 | x | x | × | 4 | − | 32 | x | ( | x | − | 4 | ) | − | 8 | = | 25 | x | x | x | x | ( | x | − | 4 | ) | − | 100 | x | x | x | ( | x | − | 4 | ) | − | 100 |
去掉方程右边的一个括号:
| | 16 | x | x | x | − | 16 | x | x | × | 4 | − | 32 | x | ( | x | − | 4 | ) | − | 8 | = | 25 | x | x | x | x | x | − | 25 | x | x | x | x | × | 4 |
方程化简为:
| | 16 | x | x | x | − | 64 | x | x | − | 32 | x | ( | x | − | 4 | ) | − | 8 | ( | 4 | x | − | 8 | ) | = | 25 | x | x | x | x | x | − | 100 | x | x | x | x | − | 100 |
去掉方程左边的一个括号:
| | 16 | x | x | x | − | 64 | x | x | − | 32 | x | x | + | 32 | x | = | 25 | x | x | x | x | x | − | 100 | x | x | x | x | − | 100 |
去掉方程右边的一个括号:
| | 16 | x | x | x | − | 64 | x | x | − | 32 | x | x | + | 32 | x | = | 25 | x | x | x | x | x | − | 100 | x | x | x | x | − | 100 |
方程化为一般式后,用因式分解法化为:
( x - 3 )( x - 6 )=0
由
x - 3 = 0
x - 6 = 0
得:
x1=3
x2=6
有 2个解。
解一元二次方程的详细方法请参阅:《一元二次方程的解法》
你的问题在这里没有得到解决?请到 热门难题 里面看看吧!