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人気のある代数 >

-25x^4+9x^2=0

解

- 25 x^{4} + 9 x^{2} = 0

解

x = 0, x = \frac{3}{5}, x = - \frac{3}{5}

+1

十進法表記

x = 0, x = 0.6, x = - 0.6

解答ステップ

- 25 x^{4} + 9 x^{2} = 0

equationを

u = x^{2}

と以下で書き換える:

u^{2} = x^{4}

- 25 u^{2} + 9 u = 0

解く

- 25 u^{2} + 9 u = 0 : u = 0, u = \frac{9}{25}

u = 0, u = \frac{9}{25}

再び

u = x^{2}

に置き換えて以下を解く:

x

解く

x^{2} = 0 : x = 0

解く

x^{2} = \frac{9}{25} : x = \frac{3}{5}, x = - \frac{3}{5}

解答は

x = 0, x = \frac{3}{5}, x = - \frac{3}{5}

グラフ

人気の例

4x^3-2x^2-4x-1=0

4 x^{3} - 2 x^{2} - 4 x - 1 = 0

6 x - x^{2} - x^{3} = 0

27x^6+26x^3-1=0

27 x^{6} + 26 x^{3} - 1 = 0

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

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

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