(m-n)^3+2n(n-m)^2 快的追分(1) (m-n)^3+2n(n-m)^2(2) 派(圆周率)R^2 - 4派(同上)X^2

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(m-n)^3+2n(n-m)^2 快的追分(1) (m-n)^3+2n(n-m)^2(2) 派(圆周率)R^2 - 4派(同上)X^2
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(m-n)^3+2n(n-m)^2 快的追分(1) (m-n)^3+2n(n-m)^2(2) 派(圆周率)R^2 - 4派(同上)X^2
(m-n)^3+2n(n-m)^2 快的追分
(1) (m-n)^3+2n(n-m)^2
(2) 派(圆周率)R^2 - 4派(同上)X^2

(m-n)^3+2n(n-m)^2 快的追分(1) (m-n)^3+2n(n-m)^2(2) 派(圆周率)R^2 - 4派(同上)X^2
(m-n)^3+2n(n-m)^2
=(m-n)³+2n(m-n)²
=(m-n)²(m-n+2n)
=(m-n)²(m+n)
πR²-4πx²
=π(R²-4x²)
=π(R+2x)(R-2x)

(1) (m-n)^3+2n(n-m)^2
=(m-n)²(m-n+2n)
=(m-n)²(m+n)
(2) 派(圆周率)R^2 - 4派(同上)X^2
=π(R²-4x²)
=π(R+2x)(R-2x)

(m-n)^3+2n(n-m)^2=(m-n)^3+2n(m-n)^2=(m-n)^2(m-n+2n)=(m+n)(m-n)^2