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人気のある代数 >

z^2-7z+2=0

解

z^{2} - 7 z + 2 = 0

解

z = \frac{7 + 41}{2}, z = \frac{7 - 41}{2}

+1

十進法表記

z = 6.70156 \dots, z = 0.29843 \dots

解答ステップ

z^{2} - 7 z + 2 = 0

解くとthe二次式

z_{1, 2} = \frac{- ( - 7 ) \pm ( - 7 ) ^{2} - 4 \cdot 1 \cdot 2}{2 \cdot 1}

(- 7)^{2} - 4 \cdot 1 \cdot 2 = 41

z_{1, 2} = \frac{- ( - 7 ) \pm 41}{2 \cdot 1}

解を分離する

z_{1} = \frac{- ( - 7 ) + 41}{2 \cdot 1}, z_{2} = \frac{- ( - 7 ) - 41}{2 \cdot 1}

z = \frac{- ( - 7 ) + 41}{2 \cdot 1} : \frac{7 + 41}{2}

z = \frac{- ( - 7 ) - 41}{2 \cdot 1} : \frac{7 - 41}{2}

二次equationの解:

z = \frac{7 + 41}{2}, z = \frac{7 - 41}{2}

グラフ

人気の例

16 = - x^{2} - 6 x

3 (x - 1)^{2} = 75

quadraticformula x^2+x-20=0

q u a d r a t i c f or m u l a x^{2} + x - 20 = 0

3/5 (3p^2-12p-10)=0

\frac{3}{5} (3 p^{2} - 12 p - 10) = 0

completesquare 2x^2-6x+4=0

co m pl e t es q u a re 2 x^{2} - 6 x + 4 = 0