r^2+36r=0

解

r^{2} + 36 r = 0

r = 0, r = - 36

解答ステップ

r^{2} + 36 r = 0

解くとthe二次式

r_{1, 2} = \frac{- 36 \pm 3 6 ^{2} - 4 \cdot 1 \cdot 0}{2 \cdot 1}

3 6^{2} - 4 \cdot 1 \cdot 0 = 36

r_{1, 2} = \frac{- 36 \pm 36}{2 \cdot 1}

解を分離する

r_{1} = \frac{- 36 + 36}{2 \cdot 1}, r_{2} = \frac{- 36 - 36}{2 \cdot 1}

r = \frac{- 36 + 36}{2 \cdot 1} : 0

r = \frac{- 36 - 36}{2 \cdot 1} : - 36

二次equationの解:

r = 0, r = - 36