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受欢迎的代数 >

3t^2-5t-2=0

解答

3 t^{2} - 5 t - 2 = 0

解答

t = 2, t = - \frac{1}{3}

+1

十进制

t = 2, t = - 0.33333 \dots

求解步骤

3 t^{2} - 5 t - 2 = 0

使用求根公式求解

t_{1, 2} = \frac{- ( - 5 ) \pm ( - 5 ) ^{2} - 4 \cdot 3 ( - 2 )}{2 \cdot 3}

(- 5)^{2} - 4 \cdot 3 (- 2) = 7

t_{1, 2} = \frac{- ( - 5 ) \pm 7}{2 \cdot 3}

将解分隔开

t_{1} = \frac{- ( - 5 ) + 7}{2 \cdot 3}, t_{2} = \frac{- ( - 5 ) - 7}{2 \cdot 3}

t = \frac{- ( - 5 ) + 7}{2 \cdot 3} : 2

t = \frac{- ( - 5 ) - 7}{2 \cdot 3} : - \frac{1}{3}

二次方程组的解是:

t = 2, t = - \frac{1}{3}

作图

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