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受欢迎的代数 >

8q^2-26q+15=0

解答

8 q^{2} - 26 q + 15 = 0

解答

q = \frac{5}{2}, q = \frac{3}{4}

+1

十进制

q = 2.5, q = 0.75

求解步骤

8 q^{2} - 26 q + 15 = 0

使用求根公式求解

q_{1, 2} = \frac{- ( - 26 ) \pm ( - 26 ) ^{2} - 4 \cdot 8 \cdot 15}{2 \cdot 8}

(- 26)^{2} - 4 \cdot 8 \cdot 15 = 14

q_{1, 2} = \frac{- ( - 26 ) \pm 14}{2 \cdot 8}

将解分隔开

q_{1} = \frac{- ( - 26 ) + 14}{2 \cdot 8}, q_{2} = \frac{- ( - 26 ) - 14}{2 \cdot 8}

q = \frac{- ( - 26 ) + 14}{2 \cdot 8} : \frac{5}{2}

q = \frac{- ( - 26 ) - 14}{2 \cdot 8} : \frac{3}{4}

二次方程组的解是:

q = \frac{5}{2}, q = \frac{3}{4}

作图

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