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受欢迎的代数 >

9x^2-2260x+129600=0

解答

9 x^{2} - 2260 x + 129600 = 0

解答

x = \frac{10 ( 113 + 1105 )}{9}, x = \frac{10 ( 113 - 1105 )}{9}

+1

十进制

x = 162.49060 \dots, x = 88.62051 \dots

求解步骤

9 x^{2} - 2260 x + 129600 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 2260 ) \pm ( - 2260 ) ^{2} - 4 \cdot 9 \cdot 129600}{2 \cdot 9}

(- 2260)^{2} - 4 \cdot 9 \cdot 129600 = 201105

x_{1, 2} = \frac{- ( - 2260 ) \pm 20 1105}{2 \cdot 9}

将解分隔开

x_{1} = \frac{- ( - 2260 ) + 20 1105}{2 \cdot 9}, x_{2} = \frac{- ( - 2260 ) - 20 1105}{2 \cdot 9}

x = \frac{- ( - 2260 ) + 20 1105}{2 \cdot 9} : \frac{10 ( 113 + 1105 )}{9}

x = \frac{- ( - 2260 ) - 20 1105}{2 \cdot 9} : \frac{10 ( 113 - 1105 )}{9}

二次方程组的解是:

x = \frac{10 ( 113 + 1105 )}{9}, x = \frac{10 ( 113 - 1105 )}{9}

作图

流行的例子

2 x (x + 1) = 5

0 = 2 x^{2} - 10 x + 12

4 x^{2} - 2 x + 25 = 0

3 x^{2} + 19 x - 40 = 0

completesquare x^2+5x+3=0

co m pl e t es q u a re x^{2} + 5 x + 3 = 0