a+b+c的立方
@扶轻1459：(a+b+c)的立方 - 作业帮
卓娜18439265504…… [答案] (A+B+C)^3 =A^3+3A(B+C)^2+3A^2(B+C)+(B+C)^3 =A^3+3A(B^2+2BC+C^2)+3A^2B+3A^2C+B^3+3B^2C+3BC^2+C^3 =A^3+B^3+C^3+3A^2B+3A^2C+3B^2A+3B^2C+3C^2A+3C^2B+6ABC
@扶轻1459：(a+b+c)的立方展开式为多少? - 作业帮
卓娜18439265504…… [答案] (A+B+C)^3 =A^3+3A(B+C)^2+3A^2(B+C)+(B+C)^3 =A^3+3A(B^2+2BC+C^2)+3A^2B+3A^2C+B^3+3B^2C+3BC^2+C^3 =A^3+B^3+C^3+3A^2B+3A^2C+3B^2A+3B^2C+3C^2A+3C^2B+6ABC
@扶轻1459：谁知道(a+b+c)立方和公式急用 - 作业帮
卓娜18439265504…… [答案] a^3+b^3+c^3+3a^2b+3ab^2+3a^c+3ac^2+3b^2c+3bc^2+6abc
@扶轻1459：数学公式(A+B+C)的立方,等于什么?????????????????????? -
卓娜18439265504…… (A+B+C)^3 =A^3+3A(B+C)^2+3A^2(B+C)+(B+C)^3 =A^3+3A(B^2+2BC+C^2)+3A^2B+3A^2C+B^3+3B^2C+3BC^2+C^3 =A^3+B^3+C^3+3A^2B+3A^2C+3B^2A+3B^2C+3C^2A+3C^2B+6ABC
@扶轻1459：三个数的完全立方公式a+b+c的和的立方是什么? - 作业帮
卓娜18439265504…… [答案] A^3+B^3+C^3+3A^2B+3A^2C+3B^2A+3B^2C+3C^2A+3C^2B+6ABC
@扶轻1459：(a+b+c)的立方等于多少? -
卓娜18439265504…… (a-b-c)^3 =(a^2-ab-ac-ab+b^2+bc-ac+bc+c^2)*(a-b-c) =(a^2+b^2+c^2-2ab-2ac+2bc)*(a-b-c) =a^3-(a^2)b-(a^2)c+a(b^2)-b^3-(b^2)c+(a^2)c-b(c^2)-c^3-2(a^2)b+2a(b^2)+2abc-2(a^2)c+2abc-2b(c^2)+2abc-2(b^2)c-2b(c^2) =a^3+b^3+c^3-3(a^2)b+3a(b^2)+3a(c^2)-3(b^2)c-3b(c^2)+6abc
@扶轻1459：[a+b+c]的平方公式和立方公式? - 作业帮
卓娜18439265504…… [答案] a+b+c的平方:a平方+b平方+c平方+2ab+2ac+2bc
@扶轻1459：三个数和的立方公式(a+b+c)³? -
卓娜18439265504…… (a+b+c)³=a³+b³+c³+3a²b+3ab²+3b²c+3bc²+3a²c+3ac²+6abc
@扶轻1459：三项立方和公式求(a+b+c)^3=? - 作业帮
卓娜18439265504…… [答案] (a+b+c)^3 =a^3+b^3+c^3+3a^2b+3ab^2+3a^2c+3ac^2+3b^2c+3bc^2+6abc 扬辉三角
@扶轻1459：(a+b+c)³立方和公式 -
卓娜18439265504…… (a+b)(a平方-ab+b平方)==a3+b3 (a-b)(a平方+ab+b平方)=a3-b3 (a+b+c)平方==a2+b2+c2+2ab+2bc+2ca (a+b)立方=a3+3a2b+3ab2+b3 (a-b)立方=a3-3a2b+3ab2-b3
卓娜18439265504…… [答案] (A+B+C)^3 =A^3+3A(B+C)^2+3A^2(B+C)+(B+C)^3 =A^3+3A(B^2+2BC+C^2)+3A^2B+3A^2C+B^3+3B^2C+3BC^2+C^3 =A^3+B^3+C^3+3A^2B+3A^2C+3B^2A+3B^2C+3C^2A+3C^2B+6ABC
@扶轻1459：(a+b+c)的立方展开式为多少? - 作业帮
卓娜18439265504…… [答案] (A+B+C)^3 =A^3+3A(B+C)^2+3A^2(B+C)+(B+C)^3 =A^3+3A(B^2+2BC+C^2)+3A^2B+3A^2C+B^3+3B^2C+3BC^2+C^3 =A^3+B^3+C^3+3A^2B+3A^2C+3B^2A+3B^2C+3C^2A+3C^2B+6ABC
@扶轻1459：谁知道(a+b+c)立方和公式急用 - 作业帮
卓娜18439265504…… [答案] a^3+b^3+c^3+3a^2b+3ab^2+3a^c+3ac^2+3b^2c+3bc^2+6abc
@扶轻1459：数学公式(A+B+C)的立方,等于什么?????????????????????? -
卓娜18439265504…… (A+B+C)^3 =A^3+3A(B+C)^2+3A^2(B+C)+(B+C)^3 =A^3+3A(B^2+2BC+C^2)+3A^2B+3A^2C+B^3+3B^2C+3BC^2+C^3 =A^3+B^3+C^3+3A^2B+3A^2C+3B^2A+3B^2C+3C^2A+3C^2B+6ABC
@扶轻1459：三个数的完全立方公式a+b+c的和的立方是什么? - 作业帮
卓娜18439265504…… [答案] A^3+B^3+C^3+3A^2B+3A^2C+3B^2A+3B^2C+3C^2A+3C^2B+6ABC
@扶轻1459：(a+b+c)的立方等于多少? -
卓娜18439265504…… (a-b-c)^3 =(a^2-ab-ac-ab+b^2+bc-ac+bc+c^2)*(a-b-c) =(a^2+b^2+c^2-2ab-2ac+2bc)*(a-b-c) =a^3-(a^2)b-(a^2)c+a(b^2)-b^3-(b^2)c+(a^2)c-b(c^2)-c^3-2(a^2)b+2a(b^2)+2abc-2(a^2)c+2abc-2b(c^2)+2abc-2(b^2)c-2b(c^2) =a^3+b^3+c^3-3(a^2)b+3a(b^2)+3a(c^2)-3(b^2)c-3b(c^2)+6abc
@扶轻1459：[a+b+c]的平方公式和立方公式? - 作业帮
卓娜18439265504…… [答案] a+b+c的平方:a平方+b平方+c平方+2ab+2ac+2bc
@扶轻1459：三个数和的立方公式(a+b+c)³? -
卓娜18439265504…… (a+b+c)³=a³+b³+c³+3a²b+3ab²+3b²c+3bc²+3a²c+3ac²+6abc
@扶轻1459：三项立方和公式求(a+b+c)^3=? - 作业帮
卓娜18439265504…… [答案] (a+b+c)^3 =a^3+b^3+c^3+3a^2b+3ab^2+3a^2c+3ac^2+3b^2c+3bc^2+6abc 扬辉三角
@扶轻1459：(a+b+c)³立方和公式 -
卓娜18439265504…… (a+b)(a平方-ab+b平方)==a3+b3 (a-b)(a平方+ab+b平方)=a3-b3 (a+b+c)平方==a2+b2+c2+2ab+2bc+2ca (a+b)立方=a3+3a2b+3ab2+b3 (a-b)立方=a3-3a2b+3ab2-b3
