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受欢迎的代数 >

x^2+x-50=0

解答

x^{2} + x - 50 = 0

解答

x = \frac{- 1 + 201}{2}, x = \frac{- 1 - 201}{2}

+1

十进制

x = 6.58872 \dots, x = - 7.58872 \dots

求解步骤

x^{2} + x - 50 = 0

使用求根公式求解

x_{1, 2} = \frac{- 1 \pm 1 ^{2} - 4 \cdot 1 \cdot ( - 50 )}{2 \cdot 1}

1^{2} - 4 \cdot 1 \cdot (- 50) = 201

x_{1, 2} = \frac{- 1 \pm 201}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- 1 + 201}{2 \cdot 1}, x_{2} = \frac{- 1 - 201}{2 \cdot 1}

x = \frac{- 1 + 201}{2 \cdot 1} : \frac{- 1 + 201}{2}

x = \frac{- 1 - 201}{2 \cdot 1} : \frac{- 1 - 201}{2}

二次方程组的解是:

x = \frac{- 1 + 201}{2}, x = \frac{- 1 - 201}{2}

作图

流行的例子

56b^2+112b-102=3+7b^2

56 b^{2} + 112 b - 102 = 3 + 7 b^{2}

solvefor x,(x^2)/(25)+(y^2)/(16)=0

so l v e f or x, \frac{x ^{2}}{25} + \frac{y ^{2}}{16} = 0

8 x^{2} + 8 x + 8 = 0

x^{2} - 4 = - 2 x - 1

0=62181787.5x-458590682.8x^2-369609

0 = 62181787.5 x - 458590682.8 x^{2} - 369609