a^2-3a+2=0

解

a^{2} - 3 a + 2 = 0

a = 2, a = 1

解答ステップ

a^{2} - 3 a + 2 = 0

解くとthe二次式

a_{1, 2} = \frac{- ( - 3 ) \pm ( - 3 ) ^{2} - 4 \cdot 1 \cdot 2}{2 \cdot 1}

(- 3)^{2} - 4 \cdot 1 \cdot 2 = 1

a_{1, 2} = \frac{- ( - 3 ) \pm 1}{2 \cdot 1}

解を分離する

a_{1} = \frac{- ( - 3 ) + 1}{2 \cdot 1}, a_{2} = \frac{- ( - 3 ) - 1}{2 \cdot 1}

a = \frac{- ( - 3 ) + 1}{2 \cdot 1} : 2

a = \frac{- ( - 3 ) - 1}{2 \cdot 1} : 1

二次equationの解:

a = 2, a = 1