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受欢迎的代数 >

-0.0055238774=(-7)(x)+(32)(x)^2

解答

- 0.0055238774 = (- 7) (x) + (32) (x)^{2}

解答

x = \frac{7 + 48.29294 \dots}{64}, x = \frac{7 - 48.29294 \dots}{64}

+1

十进制

x = 0.21795 \dots, x = 0.00079 \dots

求解步骤

- 0.0055238774 = (- 7) (x) + (32) x^{2}

整理后得

- 0.0055238774 = - 7 x + 32 x^{2}

交换两边

- 7 x + 32 x^{2} = - 0.0055238774

将

0.0055238774

para o lado esquerdo

- 7 x + 32 x^{2} + 0.00552 \dots = 0

改写成标准形式

a x^{2} + b x + c = 0

32 x^{2} - 7 x + 0.00552 \dots = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 7 ) \pm ( - 7 ) ^{2} - 4 \cdot 32 \cdot 0.00552 \dots}{2 \cdot 32}

(- 7)^{2} - 4 \cdot 32 \cdot 0.00552 \dots = 48.29294 \dots

x_{1, 2} = \frac{- ( - 7 ) \pm 48.29294 \dots}{2 \cdot 32}

将解分隔开

x_{1} = \frac{- ( - 7 ) + 48.29294 \dots}{2 \cdot 32}, x_{2} = \frac{- ( - 7 ) - 48.29294 \dots}{2 \cdot 32}

x = \frac{- ( - 7 ) + 48.29294 \dots}{2 \cdot 32} : \frac{7 + 48.29294 \dots}{64}

x = \frac{- ( - 7 ) - 48.29294 \dots}{2 \cdot 32} : \frac{7 - 48.29294 \dots}{64}

二次方程组的解是:

x = \frac{7 + 48.29294 \dots}{64}, x = \frac{7 - 48.29294 \dots}{64}

作图

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