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受欢迎的代数 >

2c^3+4c^2-126c=0

解答

2 c^{3} + 4 c^{2} - 126 c = 0

解答

c = 0, c = 7, c = - 9

求解步骤

2 c^{3} + 4 c^{2} - 126 c = 0

因式分解

2 c^{3} + 4 c^{2} - 126 c : 2 c (c - 7) (c + 9)

2 c (c - 7) (c + 9) = 0

使用零因数法则： If

ab = 0

then

a = 0

or

b = 0

c = 0 or c - 7 = 0 or c + 9 = 0

解

c - 7 = 0 : c = 7

解

c + 9 = 0 : c = - 9

解为

c = 0, c = 7, c = - 9

作图

流行的例子

-x^3+11x^2-43x+25=0

- x^{3} + 11 x^{2} - 43 x + 25 = 0

q^{3} - q = 34 + 32 q

2 x^{3} + x + 1 = 0

x^4-2x^3+5x^2-6=0

x^{4} - 2 x^{3} + 5 x^{2} - 6 = 0

solvefor a,2f=5a^5

so l v e f or a, 2 f = 5 a^{5}