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受欢迎的代数 >

x^2-11x+5=-6x+5-6x+5

解答

x^{2} - 11 x + 5 = - 6 x + 5 - 6 x + 5

解答

x = \frac{- 1 + 21}{2}, x = \frac{- 1 - 21}{2}

+1

十进制

x = 1.79128 \dots, x = - 2.79128 \dots

求解步骤

x^{2} - 11 x + 5 = - 6 x + 5 - 6 x + 5

整理后得

x^{2} - 11 x + 5 = - 12 x + 10

将

10

para o lado esquerdo

x^{2} - 11 x - 5 = - 12 x

将

12 x

para o lado esquerdo

x^{2} + x - 5 = 0

使用求根公式求解

x_{1, 2} = \frac{- 1 \pm 1 ^{2} - 4 \cdot 1 \cdot ( - 5 )}{2 \cdot 1}

1^{2} - 4 \cdot 1 \cdot (- 5) = 21

x_{1, 2} = \frac{- 1 \pm 21}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- 1 + 21}{2 \cdot 1}, x_{2} = \frac{- 1 - 21}{2 \cdot 1}

x = \frac{- 1 + 21}{2 \cdot 1} : \frac{- 1 + 21}{2}

x = \frac{- 1 - 21}{2 \cdot 1} : \frac{- 1 - 21}{2}

二次方程组的解是:

x = \frac{- 1 + 21}{2}, x = \frac{- 1 - 21}{2}

作图

流行的例子

2 0^{2} + b^{2} = 2 5^{2}

1.96(0.5-0.5x^2)=-1

1.96 (0.5 - 0.5 x^{2}) = - 1

7 x^{2} - 3 x = 1

- x^{2} - 5 x + 4 = 0

m^{2} - 3 = 0