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受欢迎的代数 >

120n^2-328n=-224

解答

120 n^{2} - 328 n = - 224

解答

n = \frac{7}{5}, n = \frac{4}{3}

+1

十进制

n = 1.4, n = 1.33333 \dots

求解步骤

120 n^{2} - 328 n = - 224

将

224

para o lado esquerdo

120 n^{2} - 328 n + 224 = 0

使用求根公式求解

n_{1, 2} = \frac{- ( - 328 ) \pm ( - 328 ) ^{2} - 4 \cdot 120 \cdot 224}{2 \cdot 120}

(- 328)^{2} - 4 \cdot 120 \cdot 224 = 8

n_{1, 2} = \frac{- ( - 328 ) \pm 8}{2 \cdot 120}

将解分隔开

n_{1} = \frac{- ( - 328 ) + 8}{2 \cdot 120}, n_{2} = \frac{- ( - 328 ) - 8}{2 \cdot 120}

n = \frac{- ( - 328 ) + 8}{2 \cdot 120} : \frac{7}{5}

n = \frac{- ( - 328 ) - 8}{2 \cdot 120} : \frac{4}{3}

二次方程组的解是:

n = \frac{7}{5}, n = \frac{4}{3}

作图

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