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受欢迎的代数 >

0=(x-3)(x-4)(x-6)

解答

0 = (x - 3) (x - 4) (x - 6)

解答

x = 3, x = 4, x = 6

求解步骤

0 = (x - 3) (x - 4) (x - 6)

交换两边

(x - 3) (x - 4) (x - 6) = 0

使用零因数法则： If

ab = 0

then

a = 0

or

b = 0

x - 3 = 0 or x - 4 = 0 or x - 6 = 0

解

x - 3 = 0 : x = 3

解

x - 4 = 0 : x = 4

解

x - 6 = 0 : x = 6

解为

x = 3, x = 4, x = 6

作图

流行的例子

2 = x^{3} - 7 x + 3

16x^3+16x^2-25x-25=0

16 x^{3} + 16 x^{2} - 25 x - 25 = 0

25 t - t^{3} = 0

x^{8} + x^{5} + 1 = 0

x^{5} = 9 x