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受欢迎的代数 >

solvefor x,12x^2-72x+77=0

解答

x, 12 x^{2} - 72 x + 77 = 0

解答

x = \frac{18 + 93}{6}, x = \frac{18 - 93}{6}

+1

十进制

x = 4.60727 \dots, x = 1.39272 \dots

求解步骤

12 x^{2} - 72 x + 77 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 72 ) \pm ( - 72 ) ^{2} - 4 \cdot 12 \cdot 77}{2 \cdot 12}

(- 72)^{2} - 4 \cdot 12 \cdot 77 = 493

x_{1, 2} = \frac{- ( - 72 ) \pm 4 93}{2 \cdot 12}

将解分隔开

x_{1} = \frac{- ( - 72 ) + 4 93}{2 \cdot 12}, x_{2} = \frac{- ( - 72 ) - 4 93}{2 \cdot 12}

x = \frac{- ( - 72 ) + 4 93}{2 \cdot 12} : \frac{18 + 93}{6}

x = \frac{- ( - 72 ) - 4 93}{2 \cdot 12} : \frac{18 - 93}{6}

二次方程组的解是:

x = \frac{18 + 93}{6}, x = \frac{18 - 93}{6}

作图

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