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受欢迎的代数 >

15x^2-6x-3=-2x

解答

15 x^{2} - 6 x - 3 = - 2 x

解答

x = \frac{3}{5}, x = - \frac{1}{3}

+1

十进制

x = 0.6, x = - 0.33333 \dots

求解步骤

15 x^{2} - 6 x - 3 = - 2 x

将

2 x

para o lado esquerdo

15 x^{2} - 4 x - 3 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 4 ) \pm ( - 4 ) ^{2} - 4 \cdot 15 ( - 3 )}{2 \cdot 15}

(- 4)^{2} - 4 \cdot 15 (- 3) = 14

x_{1, 2} = \frac{- ( - 4 ) \pm 14}{2 \cdot 15}

将解分隔开

x_{1} = \frac{- ( - 4 ) + 14}{2 \cdot 15}, x_{2} = \frac{- ( - 4 ) - 14}{2 \cdot 15}

x = \frac{- ( - 4 ) + 14}{2 \cdot 15} : \frac{3}{5}

x = \frac{- ( - 4 ) - 14}{2 \cdot 15} : - \frac{1}{3}

二次方程组的解是:

x = \frac{3}{5}, x = - \frac{1}{3}

作图

流行的例子

x^{2} + 1 = \frac{5 x}{2}

solvefor x,4x^2-8x+3=0

so l v e f or x, 4 x^{2} - 8 x + 3 = 0

3 s^{2} - 13 s = 10

4 h^{2} - 20 h + 25 = 0

solvefor x,x^2y^2+xy=6

so l v e f or x, x^{2} y^{2} + x y = 6