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受欢迎的代数 >

9m^5-27m^3=0

解答

9 m^{5} - 27 m^{3} = 0

解答

m = 0, m = - 3, m = 3

+1

十进制

m = 0, m = - 1.73205 \dots, m = 1.73205 \dots

求解步骤

9 m^{5} - 27 m^{3} = 0

因式分解

9 m^{5} - 27 m^{3} : 9 m^{3} (m + 3) (m - 3)

9 m^{3} (m + 3) (m - 3) = 0

使用零因数法则： If

ab = 0

then

a = 0

or

b = 0

m = 0 or m + 3 = 0 or m - 3 = 0

解

m + 3 = 0 : m = - 3

解

m - 3 = 0 : m = 3

解为

m = 0, m = - 3, m = 3

作图

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