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人気のある代数 >

x^2-15x+49=0

解

x^{2} - 15 x + 49 = 0

解

x = \frac{15 + 29}{2}, x = \frac{15 - 29}{2}

+1

十進法表記

x = 10.19258 \dots, x = 4.80741 \dots

解答ステップ

x^{2} - 15 x + 49 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 15 ) \pm ( - 15 ) ^{2} - 4 \cdot 1 \cdot 49}{2 \cdot 1}

(- 15)^{2} - 4 \cdot 1 \cdot 49 = 29

x_{1, 2} = \frac{- ( - 15 ) \pm 29}{2 \cdot 1}

解を分離する

x_{1} = \frac{- ( - 15 ) + 29}{2 \cdot 1}, x_{2} = \frac{- ( - 15 ) - 29}{2 \cdot 1}

x = \frac{- ( - 15 ) + 29}{2 \cdot 1} : \frac{15 + 29}{2}

x = \frac{- ( - 15 ) - 29}{2 \cdot 1} : \frac{15 - 29}{2}

二次equationの解:

x = \frac{15 + 29}{2}, x = \frac{15 - 29}{2}

グラフ

人気の例

(0.3-x)(1.5-x)+0.9(0.375)=0

(0.3 - x) (1.5 - x) + 0.9 (0.375) = 0

3 x^{2} - 3 x - 216 = 0

- 3 y^{2} + 8 y - 3 = 0

solvefor x,f(x+3)=x^2

so l v e f or x, f (x + 3) = x^{2}

(3z-18)^2+42=-3

(3 z - 18)^{2} + 42 = - 3