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受欢迎的代数 >

0.1n^2+100n+8=60000

解答

0.1 n^{2} + 100 n + 8 = 60000

解答

n = 4 (8830 - 125), n = - 4 (125 + 8830)

+1

十进制

n = 421.91105 \dots, n = - 1421.91105 \dots

求解步骤

0.1 n^{2} + 100 n + 8 = 60000

在两边乘以

10

n^{2} + 1000 n + 80 = 600000

将

600000

para o lado esquerdo

n^{2} + 1000 n - 599920 = 0

使用求根公式求解

n_{1, 2} = \frac{- 1000 \pm 100 0 ^{2} - 4 \cdot 1 \cdot ( - 599920 )}{2 \cdot 1}

100 0^{2} - 4 \cdot 1 \cdot (- 599920) = 64830

n_{1, 2} = \frac{- 1000 \pm 64 830}{2 \cdot 1}

将解分隔开

n_{1} = \frac{- 1000 + 64 830}{2 \cdot 1}, n_{2} = \frac{- 1000 - 64 830}{2 \cdot 1}

n = \frac{- 1000 + 64 830}{2 \cdot 1} : 4 (8830 - 125)

n = \frac{- 1000 - 64 830}{2 \cdot 1} : - 4 (125 + 8830)

二次方程组的解是:

n = 4 (8830 - 125), n = - 4 (125 + 8830)

作图

流行的例子

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so l v e f or y, y^{2} + 6 y + 9 = x + 8

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