X^2+11X-60=0

解

X^{2} + 11 X - 60 = 0

X = 4, X = - 15

解答ステップ

X^{2} + 11 X - 60 = 0

解くとthe二次式

X_{1, 2} = \frac{- 11 \pm 1 1 ^{2} - 4 \cdot 1 \cdot ( - 60 )}{2 \cdot 1}

1 1^{2} - 4 \cdot 1 \cdot (- 60) = 19

X_{1, 2} = \frac{- 11 \pm 19}{2 \cdot 1}

解を分離する

X_{1} = \frac{- 11 + 19}{2 \cdot 1}, X_{2} = \frac{- 11 - 19}{2 \cdot 1}

X = \frac{- 11 + 19}{2 \cdot 1} : 4

X = \frac{- 11 - 19}{2 \cdot 1} : - 15

二次equationの解:

X = 4, X = - 15