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人気のある代数 >

2p^2+5p-2=0

解

2 p^{2} + 5 p - 2 = 0

解

p = \frac{- 5 + 41}{4}, p = \frac{- 5 - 41}{4}

+1

十進法表記

p = 0.35078 \dots, p = - 2.85078 \dots

解答ステップ

2 p^{2} + 5 p - 2 = 0

解くとthe二次式

p_{1, 2} = \frac{- 5 \pm 5 ^{2} - 4 \cdot 2 ( - 2 )}{2 \cdot 2}

5^{2} - 4 \cdot 2 (- 2) = 41

p_{1, 2} = \frac{- 5 \pm 41}{2 \cdot 2}

解を分離する

p_{1} = \frac{- 5 + 41}{2 \cdot 2}, p_{2} = \frac{- 5 - 41}{2 \cdot 2}

p = \frac{- 5 + 41}{2 \cdot 2} : \frac{- 5 + 41}{4}

p = \frac{- 5 - 41}{2 \cdot 2} : \frac{- 5 - 41}{4}

二次equationの解:

p = \frac{- 5 + 41}{4}, p = \frac{- 5 - 41}{4}

グラフ

人気の例

21 n = 192 - x^{2}

x (\frac{3 x + 1}{2}) = 6

a = x^{2} - 4 x + 1

e=m^0(c^2)/1-(v^2)/(c^2)

e = m^{0} \frac{c ^{2}}{1} - \frac{v ^{2}}{c ^{2}}

(t)=-t^2+22t-85

(t) = - t^{2} + 22 t - 85