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人気のある代数 >

7w^2+2w-3=0

解

7 w^{2} + 2 w - 3 = 0

解

w = \frac{- 1 + 22}{7}, w = - \frac{1 + 22}{7}

+1

十進法表記

w = 0.52720 \dots, w = - 0.81291 \dots

解答ステップ

7 w^{2} + 2 w - 3 = 0

解くとthe二次式

w_{1, 2} = \frac{- 2 \pm 2 ^{2} - 4 \cdot 7 ( - 3 )}{2 \cdot 7}

2^{2} - 4 \cdot 7 (- 3) = 222

w_{1, 2} = \frac{- 2 \pm 2 22}{2 \cdot 7}

解を分離する

w_{1} = \frac{- 2 + 2 22}{2 \cdot 7}, w_{2} = \frac{- 2 - 2 22}{2 \cdot 7}

w = \frac{- 2 + 2 22}{2 \cdot 7} : \frac{- 1 + 22}{7}

w = \frac{- 2 - 2 22}{2 \cdot 7} : - \frac{1 + 22}{7}

二次equationの解:

w = \frac{- 1 + 22}{7}, w = - \frac{1 + 22}{7}

グラフ

人気の例

- 2 n^{2} - 5 = - 103

solvefor x,4x^2-3y^2+12z^2+12=0

so l v e f or x, 4 x^{2} - 3 y^{2} + 12 z^{2} + 12 = 0

solvefor x,f(a+h)=2x^2-8x+6

so l v e f or x, f (a + h) = 2 x^{2} - 8 x + 6

solvefor x,x^2+2x+y^2+5=0

so l v e f or x, x^{2} + 2 x + y^{2} + 5 = 0

completesquare x^2+5x=24

co m pl e t es q u a re x^{2} + 5 x = 24