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受欢迎的代数 >

2x^1-x^2+3=1

解答

2 x^{1} - x^{2} + 3 = 1

解答

x = 1 - 3, x = 1 + 3

+1

十进制

x = - 0.73205 \dots, x = 2.73205 \dots

求解步骤

2 x^{1} - x^{2} + 3 = 1

整理后得

2 x - x^{2} + 3 = 1

将

1

para o lado esquerdo

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

使用求根公式求解

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

2^{2} - 4 (- 1) \cdot 2 = 23

x_{1, 2} = \frac{- 2 \pm 2 3}{2 ( - 1 )}

将解分隔开

x_{1} = \frac{- 2 + 2 3}{2 ( - 1 )}, x_{2} = \frac{- 2 - 2 3}{2 ( - 1 )}

x = \frac{- 2 + 2 3}{2 ( - 1 )} : 1 - 3

x = \frac{- 2 - 2 3}{2 ( - 1 )} : 1 + 3

二次方程组的解是:

x = 1 - 3, x = 1 + 3

作图

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quadraticformula 6x^2+5x-4=0

q u a d r a t i c f or m u l a 6 x^{2} + 5 x - 4 = 0