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人気のある代数 >

0.1n^2+2.5n-10=0

解

0.1 n^{2} + 2.5 n - 10 = 0

解

n = \frac{- 25 + 5 41}{2}, n = \frac{- 25 - 5 41}{2}

+1

十進法表記

n = 3.50781 \dots, n = - 28.50781 \dots

解答ステップ

0.1 n^{2} + 2.5 n - 10 = 0

以下で両辺を乗じる:

10

n^{2} + 25 n - 100 = 0

解くとthe二次式

n_{1, 2} = \frac{- 25 \pm 2 5 ^{2} - 4 \cdot 1 \cdot ( - 100 )}{2 \cdot 1}

2 5^{2} - 4 \cdot 1 \cdot (- 100) = 541

n_{1, 2} = \frac{- 25 \pm 5 41}{2 \cdot 1}

解を分離する

n_{1} = \frac{- 25 + 5 41}{2 \cdot 1}, n_{2} = \frac{- 25 - 5 41}{2 \cdot 1}

n = \frac{- 25 + 5 41}{2 \cdot 1} : \frac{- 25 + 5 41}{2}

n = \frac{- 25 - 5 41}{2 \cdot 1} : \frac{- 25 - 5 41}{2}

二次equationの解:

n = \frac{- 25 + 5 41}{2}, n = \frac{- 25 - 5 41}{2}

グラフ

人気の例

solvefor x,x^2-2^y=23

so l v e f or x, x^{2} - 2^{y} = 23

solvefor x, x/2-3+3x^2+x-6=(f+g)(x)

so l v e f or x, \frac{x}{2} - 3 + 3 x^{2} + x - 6 = (f + g) (x)

solvefor x,x*y^2+x^2*y+1=0

so l v e f or x, x \cdot y^{2} + x^{2} \cdot y + 1 = 0

1.5 x^{2} + 2 x = 10

solvefor x,f=x^2-2x+k

so l v e f or x, f = x^{2} - 2 x + k