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受欢迎的代数 >

2x^2-9x+3=0

解答

2 x^{2} - 9 x + 3 = 0

解答

x = \frac{9 + 57}{4}, x = \frac{9 - 57}{4}

+1

十进制

x = 4.13745 \dots, x = 0.36254 \dots

求解步骤

2 x^{2} - 9 x + 3 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 9 ) \pm ( - 9 ) ^{2} - 4 \cdot 2 \cdot 3}{2 \cdot 2}

(- 9)^{2} - 4 \cdot 2 \cdot 3 = 57

x_{1, 2} = \frac{- ( - 9 ) \pm 57}{2 \cdot 2}

将解分隔开

x_{1} = \frac{- ( - 9 ) + 57}{2 \cdot 2}, x_{2} = \frac{- ( - 9 ) - 57}{2 \cdot 2}

x = \frac{- ( - 9 ) + 57}{2 \cdot 2} : \frac{9 + 57}{4}

x = \frac{- ( - 9 ) - 57}{2 \cdot 2} : \frac{9 - 57}{4}

二次方程组的解是:

x = \frac{9 + 57}{4}, x = \frac{9 - 57}{4}

作图

流行的例子

(6-9x)/(10)=-12

\frac{6 - 9 x}{10} = - 12

\frac{x + 4}{x - 5} < 0

5 x + 9 = 19

m + 1 \leq 6

- 10 + ∣ p + 3 ∣ = - 4