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受欢迎的代数 >

30=0.000006x^2-0.02x+25

解答

30 = 0.000006 x^{2} - 0.02 x + 25

解答

x = \frac{0.02 + 0.00052}{0.000012}, x = \frac{0.02 - 0.00052}{0.000012}

+1

十进制

x = 3566.95904 \dots, x = - 233.62570 \dots

求解步骤

30 = 0.000006 x^{2} - 0.02 x + 25

交换两边

0.000006 x^{2} - 0.02 x + 25 = 30

将

30

para o lado esquerdo

0.000006 x^{2} - 0.02 x - 5 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 0.02 ) \pm ( - 0.02 ) ^{2} - 4 \cdot 0.000006 ( - 5 )}{2 \cdot 0.000006}

(- 0.02)^{2} - 4 \cdot 0.000006 (- 5) = 0.00052

x_{1, 2} = \frac{- ( - 0.02 ) \pm 0.00052}{2 \cdot 0.000006}

将解分隔开

x_{1} = \frac{- ( - 0.02 ) + 0.00052}{2 \cdot 0.000006}, x_{2} = \frac{- ( - 0.02 ) - 0.00052}{2 \cdot 0.000006}

x = \frac{- ( - 0.02 ) + 0.00052}{2 \cdot 0.000006} : \frac{0.02 + 0.00052}{0.000012}

x = \frac{- ( - 0.02 ) - 0.00052}{2 \cdot 0.000006} : \frac{0.02 - 0.00052}{0.000012}

二次方程组的解是:

x = \frac{0.02 + 0.00052}{0.000012}, x = \frac{0.02 - 0.00052}{0.000012}

作图

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