p^2+7p=0

解

p^{2} + 7 p = 0

p = 0, p = - 7

解答ステップ

p^{2} + 7 p = 0

解くとthe二次式

p_{1, 2} = \frac{- 7 \pm 7 ^{2} - 4 \cdot 1 \cdot 0}{2 \cdot 1}

7^{2} - 4 \cdot 1 \cdot 0 = 7

p_{1, 2} = \frac{- 7 \pm 7}{2 \cdot 1}

解を分離する

p_{1} = \frac{- 7 + 7}{2 \cdot 1}, p_{2} = \frac{- 7 - 7}{2 \cdot 1}

p = \frac{- 7 + 7}{2 \cdot 1} : 0

p = \frac{- 7 - 7}{2 \cdot 1} : - 7

二次equationの解:

p = 0, p = - 7