r^2-r=0

解

r^{2} - r = 0

r = 1, r = 0

解答ステップ

r^{2} - r = 0

解くとthe二次式

r_{1, 2} = \frac{- ( - 1 ) \pm ( - 1 ) ^{2} - 4 \cdot 1 \cdot 0}{2 \cdot 1}

(- 1)^{2} - 4 \cdot 1 \cdot 0 = 1

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

解を分離する

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

r = \frac{- ( - 1 ) + 1}{2 \cdot 1} : 1

r = \frac{- ( - 1 ) - 1}{2 \cdot 1} : 0

二次equationの解:

r = 1, r = 0