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受欢迎的代数 >

5q^2-8q=35

解答

5 q^{2} - 8 q = 35

解答

q = \frac{4 + 191}{5}, q = \frac{4 - 191}{5}

+1

十进制

q = 3.56405 \dots, q = - 1.96405 \dots

求解步骤

5 q^{2} - 8 q = 35

将

35

para o lado esquerdo

5 q^{2} - 8 q - 35 = 0

使用求根公式求解

q_{1, 2} = \frac{- ( - 8 ) \pm ( - 8 ) ^{2} - 4 \cdot 5 ( - 35 )}{2 \cdot 5}

(- 8)^{2} - 4 \cdot 5 (- 35) = 2191

q_{1, 2} = \frac{- ( - 8 ) \pm 2 191}{2 \cdot 5}

将解分隔开

q_{1} = \frac{- ( - 8 ) + 2 191}{2 \cdot 5}, q_{2} = \frac{- ( - 8 ) - 2 191}{2 \cdot 5}

q = \frac{- ( - 8 ) + 2 191}{2 \cdot 5} : \frac{4 + 191}{5}

q = \frac{- ( - 8 ) - 2 191}{2 \cdot 5} : \frac{4 - 191}{5}

二次方程组的解是:

q = \frac{4 + 191}{5}, q = \frac{4 - 191}{5}

作图

流行的例子

x/8+(3x^2)/(16)-0.5=0

\frac{x}{8} + \frac{3 x ^{2}}{16} - 0.5 = 0

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x^{2} + 60 x + 500 = 6000

12 y - 4 = 9 y^{2}

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