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受欢迎的代数 >

(x+3)(x-1)=-3x+4

解答

(x + 3) (x - 1) = - 3 x + 4

解答

x = \frac{- 5 + 53}{2}, x = \frac{- 5 - 53}{2}

+1

十进制

x = 1.14005 \dots, x = - 6.14005 \dots

求解步骤

(x + 3) (x - 1) = - 3 x + 4

展开

(x + 3) (x - 1) : x^{2} + 2 x - 3

x^{2} + 2 x - 3 = - 3 x + 4

将

4

para o lado esquerdo

x^{2} + 2 x - 7 = - 3 x

将

3 x

para o lado esquerdo

x^{2} + 5 x - 7 = 0

使用求根公式求解

x_{1, 2} = \frac{- 5 \pm 5 ^{2} - 4 \cdot 1 \cdot ( - 7 )}{2 \cdot 1}

5^{2} - 4 \cdot 1 \cdot (- 7) = 53

x_{1, 2} = \frac{- 5 \pm 53}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- 5 + 53}{2 \cdot 1}, x_{2} = \frac{- 5 - 53}{2 \cdot 1}

x = \frac{- 5 + 53}{2 \cdot 1} : \frac{- 5 + 53}{2}

x = \frac{- 5 - 53}{2 \cdot 1} : \frac{- 5 - 53}{2}

二次方程组的解是:

x = \frac{- 5 + 53}{2}, x = \frac{- 5 - 53}{2}

作图

流行的例子

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