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受欢迎的代数 >

0=-x^2+44x+1

解答

0 = - x^{2} + 44 x + 1

解答

x = 22 - 485, x = 22 + 485

+1

十进制

x = - 0.02271 \dots, x = 44.02271 \dots

求解步骤

0 = - x^{2} + 44 x + 1

交换两边

- x^{2} + 44 x + 1 = 0

使用求根公式求解

x_{1, 2} = \frac{- 44 \pm 4 4 ^{2} - 4 ( - 1 ) \cdot 1}{2 ( - 1 )}

4 4^{2} - 4 (- 1) \cdot 1 = 2485

x_{1, 2} = \frac{- 44 \pm 2 485}{2 ( - 1 )}

将解分隔开

x_{1} = \frac{- 44 + 2 485}{2 ( - 1 )}, x_{2} = \frac{- 44 - 2 485}{2 ( - 1 )}

x = \frac{- 44 + 2 485}{2 ( - 1 )} : 22 - 485

x = \frac{- 44 - 2 485}{2 ( - 1 )} : 22 + 485

二次方程组的解是:

x = 22 - 485, x = 22 + 485

作图

流行的例子

\frac{k}{6.5} = - 15.7

8c^2+11c+7=6c^2

8 c^{2} + 11 c + 7 = 6 c^{2}

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因式分解 s^2-4s-21

f a c t or s^{2} - 4 s - 21

因式分解 20y^2+y-1

f a c t or 20 y^{2} + y - 1