n^2=8n

解答

n^{2} = 8 n

n = 8, n = 0

求解步骤

n^{2} = 8 n

将

8 n

para o lado esquerdo

n^{2} - 8 n = 0

使用求根公式求解

n_{1, 2} = \frac{- ( - 8 ) \pm ( - 8 ) ^{2} - 4 \cdot 1 \cdot 0}{2 \cdot 1}

(- 8)^{2} - 4 \cdot 1 \cdot 0 = 8

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

将解分隔开

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

n = \frac{- ( - 8 ) + 8}{2 \cdot 1} : 8

n = \frac{- ( - 8 ) - 8}{2 \cdot 1} : 0

二次方程组的解是:

n = 8, n = 0

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