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受欢迎的代数 >

3d^2-2d=-4

解答

3 d^{2} - 2 d = - 4

解答

d = \frac{1}{3} + i \frac{11}{3}, d = \frac{1}{3} - i \frac{11}{3}

求解步骤

3 d^{2} - 2 d = - 4

将

4

para o lado esquerdo

3 d^{2} - 2 d + 4 = 0

使用求根公式求解

d_{1, 2} = \frac{- ( - 2 ) \pm ( - 2 ) ^{2} - 4 \cdot 3 \cdot 4}{2 \cdot 3}

化简

(- 2)^{2} - 4 \cdot 3 \cdot 4 : 211 i

d_{1, 2} = \frac{- ( - 2 ) \pm 2 11 i}{2 \cdot 3}

将解分隔开

d_{1} = \frac{- ( - 2 ) + 2 11 i}{2 \cdot 3}, d_{2} = \frac{- ( - 2 ) - 2 11 i}{2 \cdot 3}

d = \frac{- ( - 2 ) + 2 11 i}{2 \cdot 3} : \frac{1}{3} + i \frac{11}{3}

d = \frac{- ( - 2 ) - 2 11 i}{2 \cdot 3} : \frac{1}{3} - i \frac{11}{3}

二次方程组的解是:

d = \frac{1}{3} + i \frac{11}{3}, d = \frac{1}{3} - i \frac{11}{3}

作图

流行的例子

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