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受欢迎的代数 >

t^3-9t=0

解答

t^{3} - 9 t = 0

解答

t = 0, t = - 3, t = 3

求解步骤

t^{3} - 9 t = 0

因式分解

t^{3} - 9 t : t (t + 3) (t - 3)

t (t + 3) (t - 3) = 0

使用零因数法则： If

ab = 0

then

a = 0

or

b = 0

t = 0 or t + 3 = 0 or t - 3 = 0

解

t + 3 = 0 : t = - 3

解

t - 3 = 0 : t = 3

解为

t = 0, t = - 3, t = 3

作图

流行的例子

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