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受欢迎的代数 >

6x^2-7x=-2

解答

6 x^{2} - 7 x = - 2

解答

x = \frac{2}{3}, x = \frac{1}{2}

+1

十进制

x = 0.66666 \dots, x = 0.5

求解步骤

6 x^{2} - 7 x = - 2

将

2

para o lado esquerdo

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

使用求根公式求解

x_{1, 2} = \frac{- ( - 7 ) \pm ( - 7 ) ^{2} - 4 \cdot 6 \cdot 2}{2 \cdot 6}

(- 7)^{2} - 4 \cdot 6 \cdot 2 = 1

x_{1, 2} = \frac{- ( - 7 ) \pm 1}{2 \cdot 6}

将解分隔开

x_{1} = \frac{- ( - 7 ) + 1}{2 \cdot 6}, x_{2} = \frac{- ( - 7 ) - 1}{2 \cdot 6}

x = \frac{- ( - 7 ) + 1}{2 \cdot 6} : \frac{2}{3}

x = \frac{- ( - 7 ) - 1}{2 \cdot 6} : \frac{1}{2}

二次方程组的解是:

x = \frac{2}{3}, x = \frac{1}{2}

作图

流行的例子

w^{2} = - 121

solvefor v,F=(jMv^2)/r

so l v e f or v, F = \frac{j M v ^{2}}{r}

x^{2} = 5^{2} + 9^{2}

x^{2} = - 3, x^{1} = 0

0 = 2 x^{2} - 12 x - 30