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受欢迎的代数 >

5n^2+19n-68=-2

解答

5 n^{2} + 19 n - 68 = - 2

解答

n = \frac{11}{5}, n = - 6

+1

十进制

n = 2.2, n = - 6

求解步骤

5 n^{2} + 19 n - 68 = - 2

将

2

para o lado esquerdo

5 n^{2} + 19 n - 66 = 0

使用求根公式求解

n_{1, 2} = \frac{- 19 \pm 1 9 ^{2} - 4 \cdot 5 ( - 66 )}{2 \cdot 5}

1 9^{2} - 4 \cdot 5 (- 66) = 41

n_{1, 2} = \frac{- 19 \pm 41}{2 \cdot 5}

将解分隔开

n_{1} = \frac{- 19 + 41}{2 \cdot 5}, n_{2} = \frac{- 19 - 41}{2 \cdot 5}

n = \frac{- 19 + 41}{2 \cdot 5} : \frac{11}{5}

n = \frac{- 19 - 41}{2 \cdot 5} : - 6

二次方程组的解是:

n = \frac{11}{5}, n = - 6

作图

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