(a+b)(a-b)=a²-b² 公式
12th Grade · Math · 45 min· 记住该公示内容，能用平方差公式进行简便运算，会判断什么时候能用平方差公式
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Learning Objective
我可以使用 (a+b)(a-b)=a²-b² 公式来简化代数表达式。
- 1
The difference of two squares pattern is a² - b² which factors to (a + b)(a - b).
- 2
To factor a difference of squares, take the square root of both terms and write them as a sum and a difference: (a + b)(a - b).
- 3
When factoring 4y² - 16, the square root of 4y² is 2y and the square root of 16 is 4, so the factored form is (2y + 4)(2y - 4).
