a 3 b 3
We know that [math](a+b)^3 = a^3 + b^3 + 3ab(a+b)[/math] [math]=> (a+b)^3 - 3ab(a+b) = a^3 + b^3[/math] [math]=> (a+b)[(a+b)^2 - 3ab] = a^3 + b^3 [/math] ... ,Basically a^3-b^3 has many formulae which are also called as identities. 1)a^3-b^3=(a-b)(a^2+ab+b^2). 2)a^3-b^3=(a-b)^3+3ab(a-b). firstly let me explain one ...
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 a 3 b 3 相關參考資料
What is the expansion of (a^3- b^3)? - Quora
[math] a^3 - b^3 = (a - b)(a^2 + b^2 + ab) [/math] Lets try to derive this expansion from the expansion of [math] (a - b) ^ 3 [/math] We have, [math](a - b) ^ 3 = a^3 ... https://www.quora.com What is the formula for a^3 + b^3? - Quora
We know that [math](a+b)^3 = a^3 + b^3 + 3ab(a+b)[/math] [math]=> (a+b)^3 - 3ab(a+b) = a^3 + b^3[/math] [math]=> (a+b)[(a+b)^2 - 3ab] = a^3 + b^3 [/math] ... https://www.quora.com What is the formula for [math]a^3-b^3[math]? - Quora
Basically a^3-b^3 has many formulae which are also called as identities. 1)a^3-b^3=(a-b)(a^2+ab+b^2). 2)a^3-b^3=(a-b)^3+3ab(a-b). firstly let me explain one ... https://www.quora.com 乘法公式
( a + b )2 = a2 + 2ab + b2. ¢ ( a - b )2 = a2 - 2ab + b2. ¢. ¢ (2) 平方差公式 : ¢ a2 - b2 = ( a + b )( a - b ). ¢. ¢ (3) 完全立方公式 : ¢ ( a + b )3 = a3 +3a2b + 3ab2 + b3. https://web.ntnu.edu.tw 乘法公式快速熟練法
一.教學情境問題描述. （一）來源:國中數學第三冊第一章. （二）內容:乘法公式. (a+b)(a-b)=a2-b2; (a+b)2=a2+2ab+b2; (a-b)2=a2-2ab+b2; (a+b)3=a3+3a2b+3ab2+b3 ... https://market.cloud.edu.tw 多項式的相乘公式
多項式的相乘公式. 1.完全平方. (a+b)2=a(a+b)+b(a+b)=a2+2ab+b2. (a-b)2=a(a-b)-b(a-b)=a2-2ab+b2. 2.平方差. (a+b)(a-b)=a(a-b)+b(a-b)=a2-b2. 3.完全立方 ... https://web.ntnu.edu.tw 立方差公式_百度百科
立方差公式与立方和公式共称为完全立方公式。 具体为：两数的平方和加上两数的积再乘以两数的差，所得到的积就等于两数的立方差。 用公式表达即：a 3-b 3=(a-b)(a ... https://baike.baidu.com |