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受欢迎的代数 >

0=16n^2+84n-4860

解答

0 = 16 n^{2} + 84 n - 4860

解答

n = 15, n = - \frac{81}{4}

+1

十进制

n = 15, n = - 20.25

求解步骤

0 = 16 n^{2} + 84 n - 4860

交换两边

16 n^{2} + 84 n - 4860 = 0

使用求根公式求解

n_{1, 2} = \frac{- 84 \pm 8 4 ^{2} - 4 \cdot 16 ( - 4860 )}{2 \cdot 16}

8 4^{2} - 4 \cdot 16 (- 4860) = 564

n_{1, 2} = \frac{- 84 \pm 564}{2 \cdot 16}

将解分隔开

n_{1} = \frac{- 84 + 564}{2 \cdot 16}, n_{2} = \frac{- 84 - 564}{2 \cdot 16}

n = \frac{- 84 + 564}{2 \cdot 16} : 15

n = \frac{- 84 - 564}{2 \cdot 16} : - \frac{81}{4}

二次方程组的解是:

n = 15, n = - \frac{81}{4}

作图

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