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受欢迎的代数 >

16x^2-28x+12.25=0

解答

16 x^{2} - 28 x + 12.25 = 0

解答

x = \frac{7}{8}

+1

十进制

x = 0.875

求解步骤

16 x^{2} - 28 x + 12.25 = 0

在两边乘以

100

1600 x^{2} - 2800 x + 1225 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 2800 ) \pm ( - 2800 ) ^{2} - 4 \cdot 1600 \cdot 1225}{2 \cdot 1600}

(- 2800)^{2} - 4 \cdot 1600 \cdot 1225 = 0

x_{1, 2} = \frac{- ( - 2800 ) \pm 0}{2 \cdot 1600}

x = \frac{- ( - 2800 )}{2 \cdot 1600}

\frac{- ( - 2800 )}{2 \cdot 1600} = \frac{7}{8}

x = \frac{7}{8}

二次方程组的解是:

x = \frac{7}{8}

作图

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