立方和,立方差,和的立方,差的立方公式a3+b3=?a3-b3=?(a+b)3=?(a-b)3=?
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立方和,立方差,和的立方,差的立方公式a3+b3=?a3-b3=?(a+b)3=?(a-b)3=?立方和,立方差,和的立方,差的立方公式a3+b3=?a3-b3=?(a+b)3=?(a-b)3=?立方
立方和,立方差,和的立方,差的立方公式a3+b3=?a3-b3=?(a+b)3=?(a-b)3=?
立方和,立方差,和的立方,差的立方公式
a3+b3=?
a3-b3=?
(a+b)3=?
(a-b)3=?
立方和,立方差,和的立方,差的立方公式a3+b3=?a3-b3=?(a+b)3=?(a-b)3=?
a^3+b^3=(a+b)*(a^2-ab+b^2)
a^3-b^3=(a-b)*(a^2-ab+b^2)
(a+b）^3=a^3+3(a^2)b+3(b^2)a+b^3
(a-b）^3=a^3-3(a^2)b+3(b^2)a-b^3等学习二项式定理后,你就明白了
a^3 + b^3 = (a+b) (a^2-ab+b^2)
a^3 - b^3 = (a-b) (a^2+ab+b^2)
(a-b)^3=a^3-3a^2b+3ab^2-b^3
(a-b)^3=a^3-3(a^2*b)+3(a*b^2)-b^3
a³ + b³ = (a+b) (a²-ab+b²)
a³ - b³ = (a-b) (a²+ab+b²)
(a-b) ³=a³-3a²b+3ab²-b³
(a-b) ³=a³-3(a²*b)+3(a*b²)-b³