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人気のある代数 >

x^4-7=0

解

x^{4} - 7 = 0

解

x = 7, x = - 7, x = 7 i, x = - 7 i

解答ステップ

x^{4} - 7 = 0

7

を右側に移動します

x^{4} = 7

equationを

u = x^{2}

と以下で書き換える:

u^{2} = x^{4}

u^{2} = 7

解く

u^{2} = 7 : u = 7, u = - 7

u = 7, u = - 7

再び

u = x^{2}

に置き換えて以下を解く:

x

解く

x^{2} = 7 : x = 7, x = - 7

解く

x^{2} = - 7 : x = 7 i, x = - 7 i

解答は

x = 7, x = - 7, x = 7 i, x = - 7 i

グラフ

人気の例

6t(t^3-1)=7t^2(2t-1)-5t

6 t (t^{3} - 1) = 7 t^{2} (2 t - 1) - 5 t

solvefor z,(z-1)^4=-1

so l v e f or z, (z - 1)^{4} = - 1

18 = b (\frac{2 b}{3})^{2}

4x^3+x^2+x-48=0

4 x^{3} + x^{2} + x - 48 = 0

7(7x^2)^2=4(7x^2)+1

7 (7 x^{2})^{2} = 4 (7 x^{2}) + 1