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人気のある代数 >

4r^4-64r^2=0

解

4 r^{4} - 64 r^{2} = 0

解

r = 4, r = - 4, r = 0

解答ステップ

4 r^{4} - 64 r^{2} = 0

equationを

u = r^{2}

と以下で書き換える:

u^{2} = r^{4}

4 u^{2} - 64 u = 0

解く

4 u^{2} - 64 u = 0 : u = 16, u = 0

u = 16, u = 0

再び

u = r^{2}

に置き換えて以下を解く:

r

解く

r^{2} = 16 : r = 4, r = - 4

解く

r^{2} = 0 : r = 0

解答は

r = 4, r = - 4, r = 0

グラフ

人気の例

5x^3-10x^2+10x=0

5 x^{3} - 10 x^{2} + 10 x = 0

x^{3} = 4 x^{2} + 5 x

x^{4} - 7 x^{2} - 12 = 0

9x^4-75x^3+126x^2=0

9 x^{4} - 75 x^{3} + 126 x^{2} = 0

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