因式分9a²-(b-c)²=(3a+b-c)(3a-b+c)
如果是去括号：
9a²-(b-c)²
=9a²-b²-c²+2bc
猜你喜欢
- 1填含有”马“的成语.
- 2英汉互译：冰箱里有鸡肉吗?
- 35ab的3次方-5ab 用因式分解计算 还有-x的4次方+81 也是用因式分解计算
- 4在一个正方形操场四周每边栽12棵树,四个角上各1棵,一共要栽（ ）棵.
- 5English is widely spoken by many people.
- 6八年级下数学轻巧夺冠 沪科版 银版的填空选择
- 7五年级英语连词成句:we,one,why,make,don't
- 8what is meant by" full employment"and what is meant by the "natural rate of unemployment"?
- 9初一有理数除法
- 10Y=lg(x-x的平方)的定义域怎么求?