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受欢迎的代数 >

10x^2+8x-1=0

解答

10 x^{2} + 8 x - 1 = 0

解答

x = \frac{- 4 + 26}{10}, x = - \frac{4 + 26}{10}

+1

十进制

x = 0.10990 \dots, x = - 0.90990 \dots

求解步骤

10 x^{2} + 8 x - 1 = 0

使用求根公式求解

x_{1, 2} = \frac{- 8 \pm 8 ^{2} - 4 \cdot 10 ( - 1 )}{2 \cdot 10}

8^{2} - 4 \cdot 10 (- 1) = 226

x_{1, 2} = \frac{- 8 \pm 2 26}{2 \cdot 10}

将解分隔开

x_{1} = \frac{- 8 + 2 26}{2 \cdot 10}, x_{2} = \frac{- 8 - 2 26}{2 \cdot 10}

x = \frac{- 8 + 2 26}{2 \cdot 10} : \frac{- 4 + 26}{10}

x = \frac{- 8 - 2 26}{2 \cdot 10} : - \frac{4 + 26}{10}

二次方程组的解是:

x = \frac{- 4 + 26}{10}, x = - \frac{4 + 26}{10}

作图

流行的例子

\frac{g}{3} = \frac{4}{3}

y + 3 = 3 y + 7

(2^{2})^{4} = 2^{6}

因式分解 30uv+30u+36u^2+25v

f a c t or 30 uv + 30 u + 36 u^{2} + 25 v

因式分解 125-27y^3

f a c t or 125 - 27 y^{3}